4z+31=12z+15

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Solution for 4z+31=12z+15 equation: 



4z+31=12z+15

We move all terms to the left:

4z+31-(12z+15)=0

We get rid of parentheses

4z-12z-15+31=0

We add all the numbers together, and all the variables

-8z+16=0

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

-8z=-16

z=-16/-8

z=+2

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