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2z/7-8=-5
We move all terms to the left:
2z/7-8-(-5)=0
We add all the numbers together, and all the variables
2z/7-3=0
We multiply all the terms by the denominator
2z-3*7=0
We add all the numbers together, and all the variables
2z-21=0
We move all terms containing z to the left, all other terms to the right
2z=21
z=21/2
z=10+1/2
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