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12=4(x-7)
We move all terms to the left:
12-(4(x-7))=0
We calculate terms in parentheses: -(4(x-7)), so:We get rid of parentheses
4(x-7)
We multiply parentheses
4x-28
Back to the equation:
-(4x-28)
-4x+28+12=0
We add all the numbers together, and all the variables
-4x+40=0
We move all terms containing x to the left, all other terms to the right
-4x=-40
x=-40/-4
x=+10
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