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5x-7=8(-5x+16)
We move all terms to the left:
5x-7-(8(-5x+16))=0
We calculate terms in parentheses: -(8(-5x+16)), so:We get rid of parentheses
8(-5x+16)
We multiply parentheses
-40x+128
Back to the equation:
-(-40x+128)
5x+40x-128-7=0
We add all the numbers together, and all the variables
45x-135=0
We move all terms containing x to the left, all other terms to the right
45x=135
x=135/45
x=3
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