7z+15=-2z

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Solution for 7z+15=-2z equation: 



7z+15=-2z

We move all terms to the left:

7z+15-(-2z)=0

We get rid of parentheses

7z+2z+15=0

We add all the numbers together, and all the variables

9z+15=0

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

9z=-15

z=-15/9

z=-1+2/3

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