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1) 15:(x+2) = 3
x + 2 = 15 : 3
x + 2 = 5
x = 5 - 2
x = 3
2) 20:(1+x) = 2
1 + x = 20 : 2
1 + x = 10
x = 10 - 1
x = 9
3) 5(x+35) = 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
4) 541+(218-x) = 73
218 - x = 73 - 541
218 - x = -468
x = 218 - ( - 468 )
x = 686
5) 1230:3 (x-20) = 10
410 . ( x - 20 ) = 10
x - 20 = 10 : 410
x - 20 = 1/41
x = 1/41 + 20
x = 821/41
6) 48-3(x+5) = 24
3( x + 5 ) = 48 - 24
3( x + 5 ) = 24
x + 5 = 24 : 3
x + 5 = 8
x = 8 - 5
x = 3
7) 4x + 18 : 2=13
4x + 9 = 13
4x = 13 - 9
4x = 4
x = 1
8) X-48:16 = 37
x - 3 = 37
x = 37 + 3
x = 40
a, 15: (x+2) = 3
x+2 =15:3
x+2 = 5
x = 5-2
x = 3
b, 20: (1+x) = 2
1+x = 20:2
1+x = 10
x = 10-1
x = 9
c, 5(x+35) = 515
x+35 = 515 :5
x+35 = 103
x = 103-35
x = 68
d, 541+ (218-x) = 73
218-x = 73-541
218-x = - 468
x = 218 - (-468)
x = 218 + 468
x = 686
e, 1230:3. (x-20) = 10
410(x-20) = 10
x-20 = 10: 410
x-20 = 1/41
x = 1/41 + 20
x = 821/41
f, 48-3(x+5) = 24
3(x+5) = 48-24
3(x+5) = 24
x+5 = 24:3
x +5 = 8
x = 8-5
x =3
g, 4x + 18 : 2 = 13
4x + 9 = 13
4x = 13-9
4x = 4
x = 4:4
x = 1
j, x - 48:16 = 37
x- 3 = 37
x = 37+3
x = 40
a).\(541+\left(218-x\right)=735\)
\(218-x=735-541\)
\(218-x=194\)
\(x=218-194\)
\(x=24\)
b).\(5\left(x+35\right)=515\)
\(x+35=515:5\)
\(x+35=103\)
\(x=103-35\)
\(x=68\)
c).\(96-3\left(x+1\right)=42\)
\(3\left(x+1\right)=96-42\)
\(3\left(x+1\right)=54\)
\(\left(x+1\right)=54:3\)
\(\left(x+1\right)=18\)
\(x=18-1\)
\(x=17\)
d)\(12x-33=3^2\cdot3^3\)
\(12x-33=3^5\)
\(12x-33=243\)
\(12x=243+33\)
\(12x=276\)
\(x=276:12\)
\(x=23\)
\(Nhớ\)\(tk\)\(mình\)\(nha\)\(!\)
`@` `\text {Ans}`
`\downarrow`
`a)`
`5(x + 35) = 515`
`=> x + 35 = 515 \div 5`
`=> x+ 35 = 103`
`=> x = 103 - 35`
`=> x = 68`
Vậy, `x = 68`
`b)`
`12x - 33 = 3^2 * 3^3`
`=> 12x - 33 = 3^5`
`=> 12x = 3^5 + 33`
`=> 12x = 276`
`=> x = 276 \div 12`
`=> x = 23`
Vậy, `x = 23`
`c)`
`6x - 5 = 19`
`=> 6x = 19 + 5`
`=> 6x = 24`
`=> x = 24 \div 6`
`=> x = 4`
Vậy, `x = 4`
`d)`
`4(x - 12) + 9 = 17`
`=> 4(x - 12) = 17 - 9`
`=> 4(x - 12) = 8`
`=> x - 12 = 8 \div 4`
`=> x - 12 = 2`
`=> x = 14`
Vậy, `x = 14`
`e)`
123 - 5(x + 4) = 38`
`=> 5(x + 4)= 123 - 38`
`=> 5(x + 4) =85`
`=> x + 4 = 85 \div 5`
`=> x + 4 = 17`
`=> x = 13`
Vậy, `x = 13`
`f)`
`(3x - 2^4) * 7^3 = 2 * 7^4`
`=> 3x - 2^4 = 2 * 7^4 \div 7^3`
`=> 3x - 2^4 = 2* 7`
`=> 3x - 2^4 = 14`
`=> 3x = 14 + 2^4`
`=> 3x = 30`
`=> x = 30 \div 3`
`=> x = 10`
Vậy, `x = 10.`
a, 541 + (218 - x) = 735
218 - x = 735 - 541
218 - x = 194
x = 218 - 194
x = 24
Vậy x = 24
b, 5(x + 35) = 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
Vậy x = 68
c, 96 - 3(x + 1) = 42
3(x + 1) = 96 - 42
3(x + 1) = 54
x + 1 = 54 : 3
x + 1 = 18
x = 18 - 1 = 17
Vậy x = 17
d, 12x - 33 = 32 . 33
12x - 33 = 35
12x - 33 = 243
12x = 243 + 33
12x = 276
x = 276 : 12
x = 23
Vậy x = 23
Ủng hộ mk nha !!! ^_^
c)96-3(x+1)=42
3(x+1)=96-42
3(x-1)=54
(x+1)=54:3
(x+1)=18
x=18-1
x=17
a, 541 + [218 - x] = 735
[ 218 - x ] = 735 - 541
[ 218 - x ] = 194
218 - x = 194
= 218 - 194
=24
a) 541 + ( 218 - x ) = 735
218 - x = 194
x = 24
b) 5 ( x + 35 ) = 515
x + 35 = 103
x = 68
c) 96 - 3 ( x + 1 ) = 42
3 ( x + 1 ) = 54
x + 1 = 18
x = 17
d ) 12x - 33 = 3 2 * 3 3
12x - 33 = 243
12x = 276
x = 23
a; 218-x=735-541
218-x=194
x=218-194
x=24
b; x+35=515/5
x+35=103
x=103-35
x=68
c;3*(x+1)=96-42
3*(x+1)=54
x+1=54/3
x+1=18
x=18-1
x=17
d;12x-33=243
12x=243+33
12x=276
x=276/12
x=23
541 + (218 - x) = 735
218 - x = 735 - 541
218 - x = 194
x = 218 - 194
x = 24
5(x + 35) = 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
96- 3(x + 1) = 42
3(x + 1) = 96 - 42
3(x + 1) = 54
x + 1 = 54 : 3
x + 1 = 18
x = 18 - 1
x = 17
12x - 33 = 32.32
12x - 33 = 81
12x = 81 + 33
12x = 114
x = 12
541 + (218-x) = 735 5(x+35)=515
218 - x = 735 - 541 x+35 = 515:5
218 - x = 194 x +35 =103
x = 218-194 x = 103-35
x = 24 x = 68
96-3(x+1) = 42 12x - 33 = 34
3( X+1)= 96 - 42 12x-33 = 81
3( x+1) = 54 12x = 81+33
x +1 = 54:3 12x = 114
x +1 = 18 x = 114:12
x = 18-2 x = 12
x = 16
Bài này lm lâu lm đó nhớ k mik nha
a) 541 + (218 - x) = 735
\(\Rightarrow\) 218 - x = 735 - 541
\(\Rightarrow\) 218 - x = 194.
\(\Rightarrow\) x = 218 - 194
\(\Rightarrow\) x = 24
b) 5(x + 35) = 515
\(\Rightarrow\) x + 35 = 515 : 5 = 103.
\(\Rightarrow\) x = 103 - 35
\(\Rightarrow\) x =68.
c) 96 - 3(x + 1) = 42
\(\Rightarrow\) 3(x + 1) = 96 - 42 = 54
\(\Rightarrow\) x + 1 = 54 : 3
\(\Rightarrow\) x = 18 - 1
\(\Rightarrow\) x = 17
d) 12x - 33 = 32 . 33
\(\Rightarrow\) 12x - 33 = 243
\(\Rightarrow\)12x = 243 + 33
\(\Rightarrow\) 12x = 276.
\(\Rightarrow\) x = 23.
a) 541 + (218 - x) = 735
Suy ra 218 - x = 735 - 541 hay 218 - x = 194.
Do đó x = 218 - 194. Vậy x = 24.
b) 5(x + 35) = 515 suy ra x + 35 = 515 : 5 = 103.
Do đó x = 103 - 35 =68.
c) Từ 96 - 3(x + 1) = 42 suy ra 3(x + 1) = 96 - 42 = 54. Do đó x + 1 = 54 : 3 = 18. Vậy x = 18 - 1 hay x = 17.
d) Từ 12x - 33 = 32 . 33 hay 12x - 33 = 243 suy ra 12x = 243 + 33 hay 12x = 276. Vậy x = 23.
a) 5(x + 35) = 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
b) 12x - 33 = 32.33
12x - 33 = 35
12x - 33 = 243
12x = 243 + 33
12x = 276
x = 276 : 12
x = 23
c) 541 + (218 - x) = 73
218 - x = 73 - 541
218 - x = -468
-x = -468 - 218
-x = -686
x = 686
d) 1230 : 3(x - 20) = 10
410(x - 20) = 10
x - 20 = 10 : 410
x - 20 = 1/41
x = 1/41 + 20
x = 821/41
5(x+ 35 ) = 515
x + 35 = 103
x = 68
12x - 33 = 32 . 33
12x = 276
x = 23
541 + ( 218 - x ) = 73
218 - x = - 468
x = - 250
1230 : 3( x - 20 ) = 10
=> 3x - 60 = 123
=> 3x = 183
=> x = 61
Study well