z+54=3z-84

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Solution for z+54=3z-84 equation: 



z+54=3z-84

We move all terms to the left:

z+54-(3z-84)=0

We get rid of parentheses

z-3z+84+54=0

We add all the numbers together, and all the variables

-2z+138=0

We move all terms containing z to the left, all other terms to the right

-2z=-138

z=-138/-2

z=+69

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