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8x/8=-90/8
We move all terms to the left:
8x/8-(-90/8)=0
We get rid of parentheses
8x/8+90/8=0
We multiply all the terms by the denominator
8x+90=0
We move all terms containing x to the left, all other terms to the right
8x=-90
x=-90/8
x=-11+1/4
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