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-12(x-5)+7(3-x)=5
=>-12x-(-60)+21-7x=5
=>-12x+60+21-7x=5
=>-12x-7x=5-21-60
=>-19x=-76
=>x=(-76):(-19)
=>x=4
![](https://rs.olm.vn/images/avt/0.png?1311)
-12*(x-5)+7*(3-x)=5
<=> -12x+60+21-7x=5
<=> -19x+81=5
<=> -19x= -76
<=> x= 4
Ta có: \(-12.\left(x-5\right)+7.\left(3-x\right)=5\)
\(\Rightarrow-12.x+60+21-7x=5\)
\(\Rightarrow\left(-19\right).x=5-21-60\)
\(\Rightarrow\left(-19\right)x=\left(-76\right)\)
\(\Rightarrow x=4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
-12(x-5) + 7(3-x) = 5
-12x + 60 + 21 - 7x = 5
-12x - 7x = 5 + (-60) + (-21)
-12x + (-7x) = -76
-19x = -76
19x = 76
x = 76 : 19
x = 4
Vậy x = 4
k mk nha bn
\(-12\left(x-5\right)+7\left(3-x\right)=5\)
\(-12x+60+21-7x=5\)
\(-19x+81=5\)
\(-19x=5-81\)
\(-19x=-76\)
\(x=4\)
Vậy \(x=4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
-12.(x-5)+7.(3-x)=5
<=> -12x+60+21-7x=5
<=>-12x-7x=5-60-21
<=>-19x=-76
<=>x=4
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
- 12.( x - 5 ) + 7.( 3 - x ) = 5
=> - 12x + 60 + 21 - 7x = 5
=> ( - 12x - 7x ) + 60 + 21 = 5
=> - 19x + 81 = 5
=> - 19x = 5 - 81
=> - 19x = - 76
=> x = ( - 76 ) : ( - 19 )
=> x = 4
Vậy x = 4
![](https://rs.olm.vn/images/avt/0.png?1311)
- 12( x - 5 ) + 7( 3 - x ) = 5
( x - 5 ) . ( 3 - x ) = - 12 + 7 + 5
x - 8 = - 12 + 7 + 5
x - 8 = - 5 + 5
x - 8 = 0
x = 0 + 8
x = 8
Nếu mà mình sai thì bạn đừng kêu nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\Rightarrow\left(-12x-\left(-60\right)\right)+\left(21-7x\right)=5\)
\(\Rightarrow-12+60+21-7x=5\)
\(\Rightarrow-12x-7x+60+21=5\)
\(\Rightarrow-19x+81=5\)
\(\Rightarrow-19x=5-81\)
\(\Rightarrow-19x=-76\)
\(\Rightarrow x=-76\div\left(-19\right)\)
\(\Rightarrow x=4\)
KL x=4
- 12.( x - 5 ) + 7.( 3 - x ) = 5
=> - 12x + 60 + 21 - 7x = 5
=> ( - 12x - 7x ) + 60 + 21 = 5
=> - 19x + 81 = 5
=> - 19x = 5 - 81
=> - 19x = - 76
=> x = ( - 76 ) : ( - 19 )
=> x = 4
Vậy x = 4