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20x=16(x-1)
We move all terms to the left:
20x-(16(x-1))=0
We calculate terms in parentheses: -(16(x-1)), so:We get rid of parentheses
16(x-1)
We multiply parentheses
16x-16
Back to the equation:
-(16x-16)
20x-16x+16=0
We add all the numbers together, and all the variables
4x+16=0
We move all terms containing x to the left, all other terms to the right
4x=-16
x=-16/4
x=-4
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