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-142=-5x+4(6x-7)
We move all terms to the left:
-142-(-5x+4(6x-7))=0
We calculate terms in parentheses: -(-5x+4(6x-7)), so:We get rid of parentheses
-5x+4(6x-7)
We multiply parentheses
-5x+24x-28
We add all the numbers together, and all the variables
19x-28
Back to the equation:
-(19x-28)
-19x+28-142=0
We add all the numbers together, and all the variables
-19x-114=0
We move all terms containing x to the left, all other terms to the right
-19x=114
x=114/-19
x=-6
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