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7(2x-4)=8(x-5)
We move all terms to the left:
7(2x-4)-(8(x-5))=0
We multiply parentheses
14x-(8(x-5))-28=0
We calculate terms in parentheses: -(8(x-5)), so:We get rid of parentheses
8(x-5)
We multiply parentheses
8x-40
Back to the equation:
-(8x-40)
14x-8x+40-28=0
We add all the numbers together, and all the variables
6x+12=0
We move all terms containing x to the left, all other terms to the right
6x=-12
x=-12/6
x=-2
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