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64=4(7+x)
We move all terms to the left:
64-(4(7+x))=0
We add all the numbers together, and all the variables
-(4(x+7))+64=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+64=0
We add all the numbers together, and all the variables
-4x+36=0
We move all terms containing x to the left, all other terms to the right
-4x=-36
x=-36/-4
x=+9
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