9z+15=7z+30

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Solution for 9z+15=7z+30 equation: 



9z+15=7z+30

We move all terms to the left:

9z+15-(7z+30)=0

We get rid of parentheses

9z-7z-30+15=0

We add all the numbers together, and all the variables

2z-15=0

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

2z=15

z=15/2

z=7+1/2

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