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51=15z+16
We move all terms to the left:
51-(15z+16)=0
We get rid of parentheses
-15z-16+51=0
We add all the numbers together, and all the variables
-15z+35=0
We move all terms containing z to the left, all other terms to the right
-15z=-35
z=-35/-15
z=2+1/3
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