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2z/7=-10
We move all terms to the left:
2z/7-(-10)=0
We add all the numbers together, and all the variables
2z/7+10=0
We multiply all the terms by the denominator
2z+10*7=0
We add all the numbers together, and all the variables
2z+70=0
We move all terms containing z to the left, all other terms to the right
2z=-70
z=-70/2
z=-35
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