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a. 100 - 7 ( x - 5 ) = 58
<=> 7 ( x - 5 ) = 100 - 58
<=> 7 ( x - 5 ) = 42
<=> x - 5 = 42 : 7
<=> x - 5 = 6
<=> x = 6 + 5
<=> x = 11
Tương tự tiếp.
a;100-7(x-5)=58
=>7(x-5)=100-58=42
=>x-5=42:7=6
=>x=6+5=11
b;12(x-1):3=72
=>12(x-1)=72.3=216
=>x-1=216:12=18
=>x=18+1=19
c;12-4(x-1)=4
=>4(x-1)=12-4=8
=>x-1=8:4=2
=>x=2+1=3
d;32-12x=8
=>12x=32-8=24
=>x=24:12=2
nho h do nhe viet moi tay lam day biet ko
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a) 128 - 3(x + 4) = 23
3(x + 4) = 128 -23
3(x + 4) = 105
x + 4 = 105 : 3
x + 4 = 35
x = 35 - 4
x = 31
\(a.128-3\left(x+4\right)=23.\)
\(3\left(x+4\right)=128-23\)
\(3\left(x+4\right)=105\)
\(x+4=105:3=35\)
\(x=35-4=31\)
\(b.\left[\left(4x+28\right)\cdot3+55\right]:5=35\)
\(\left(4x+28\right)\cdot3+55=35\cdot5=175\)
\(\left(4x+28\right)\cdot3=175-55=120\)
\(4x+28=120:3=40\)
\(4x=40-28=12\)
\(x=12:4=3\)
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a ) 541 + ( 218 - x ) = 735
218 - x = 735 - 541 = 194
x = 218 - 194 = 24
541 + ( 218 - x ) = 735
218 - x = 735 - 541
218 - x = 194
x = 218 - 194
x = 24
5( x + 35 ) = 515
x + 35 = 103
x = 103 - 35
x = 68
96 - 3( x + 1 ) = 42
3( x + 1 ) = 96 - 42
3( x + 1 ) = 54
x + 1 = 18
x = 18 - 1
x = 17
12x - 33 = 32 . 33
12x - 33 = 243
12x = 243 + 33
12x = 276
x = 23
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(12x-4^3)x8^3=4x8^4
=> (12x-64)x512=16384
=> 12x-64=16384:512
=> 12x-64=32
=> 12x = 32+64
=> 12x = 96
=> x = 96:12
=> x = 8
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y + 2y = 12
3y = 12
y = 4.
Mình cx không hiểu ý bạn đang làm gì cho lắm nhưng mình cho rằng là bạn đang tìm y vậy.
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12x-43=4.84:89
12x-43=32
12x =32+64(32))
12x =96
x= 96:12
x=8
k nha
(12x-43)=4.(84:83)
12x-64=4.8
12x-64=32
12x=32+64
12x=96
x=96/12
x=8
![](https://rs.olm.vn/images/avt/0.png?1311)
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12+x=123
<=>x=123-12
<=>x=111
vậy x=111
12x-11x=1234+x
<=>12x-11x+x=1234
<=>2x=1234
<=>x=617
vậy x=617
k mk nha mấy bạn