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z-161/8=7/8
We move all terms to the left:
z-161/8-(7/8)=0
We add all the numbers together, and all the variables
z-161/8-(+7/8)=0
We get rid of parentheses
z-161/8-7/8=0
We multiply all the terms by the denominator
z*8-161-7=0
We add all the numbers together, and all the variables
z*8-168=0
Wy multiply elements
8z-168=0
We move all terms containing z to the left, all other terms to the right
8z=168
z=168/8
z=21
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