7z+9=3z+15

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Solution for 7z+9=3z+15 equation: 



7z+9=3z+15

We move all terms to the left:

7z+9-(3z+15)=0

We get rid of parentheses

7z-3z-15+9=0

We add all the numbers together, and all the variables

4z-6=0

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

4z=6

z=6/4

z=1+1/2

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