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4(2x+7)=5(x-4)
We move all terms to the left:
4(2x+7)-(5(x-4))=0
We multiply parentheses
8x-(5(x-4))+28=0
We calculate terms in parentheses: -(5(x-4)), so:We get rid of parentheses
5(x-4)
We multiply parentheses
5x-20
Back to the equation:
-(5x-20)
8x-5x+20+28=0
We add all the numbers together, and all the variables
3x+48=0
We move all terms containing x to the left, all other terms to the right
3x=-48
x=-48/3
x=-16
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