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84z=100z-8(-2z+88)
We move all terms to the left:
84z-(100z-8(-2z+88))=0
We calculate terms in parentheses: -(100z-8(-2z+88)), so:We get rid of parentheses
100z-8(-2z+88)
We multiply parentheses
100z+16z-704
We add all the numbers together, and all the variables
116z-704
Back to the equation:
-(116z-704)
84z-116z+704=0
We add all the numbers together, and all the variables
-32z+704=0
We move all terms containing z to the left, all other terms to the right
-32z=-704
z=-704/-32
z=+22
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