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40+7x=8(x+4)
We move all terms to the left:
40+7x-(8(x+4))=0
We calculate terms in parentheses: -(8(x+4)), so:We get rid of parentheses
8(x+4)
We multiply parentheses
8x+32
Back to the equation:
-(8x+32)
7x-8x-32+40=0
We add all the numbers together, and all the variables
-1x+8=0
We move all terms containing x to the left, all other terms to the right
-x=-8
x=-8/-1
x=+8
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