a, 4691:2 b, 1230:3 c, 1607:4 d, 1038:5
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a/ 321 + 2(x -4) = 2017
2(x -4) =1696
x-4=848
x=852
b/ 48 - 3(x +5) =24
3(x +5)=24
x+5=8
x=3
c/1230 : 3(x-20) = 10
3(x-20)=123
x-20=41
x=61
d/2x - 238 = 2^3 x 3^2
2x - 238 =72
2x=200
x=100
a) \(321+2\left(x-4\right)=2017\)
\(2x-8=2017-321\)
\(2x-8=1696\)
\(2x=1704\)
\(x=852\)
vay \(x=852\)
b) \(48-3\left(x+5\right)=24\)
\(3x+15=48-24\)
\(3x+15=24\)
\(3x=9\)
\(x=3\)
vay \(x=3\)
c) \(1230:3\left(x-20\right)=10\)
\(3x-60=1230:10\)
\(3x-60=123\)
\(3x=183\)
\(x=61\)
vay \(x=61\)
d) \(2x-238=2^3.3^2\)
\(2x-238=8.9\)
\(2x-238=72\)
\(2x=310\)
\(x=155\)
vay \(x=155\)
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
a, 1230 : 3(x – 20) = 10
3(x – 20) = 123
x – 20 = 41
x = 61
b, 250 – 10.(24 – 3x):15 = 244
10.(24 – 3x):15 = 6
10.(24 – 3x) = 90
24 – 3x = 9
3x = 15
x = 5
c, 4 x 3 + 15 = 47
4 x 3 = 32
x 3 = 8 = 2 3
x = 2
d, 65 - 4 x + 2 = 2014 0
65 - 4 x + 2 = 1
4 x + 2 = 64 = 4 3
x + 2 = 3
x = 1
e, 4 . 2 x - 3 = 125
4 . 2 x = 128
2 x = 32 = 2 5
x = 5