7z+5=2z-15

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Solution for 7z+5=2z-15 equation: 



7z+5=2z-15

We move all terms to the left:

7z+5-(2z-15)=0

We get rid of parentheses

7z-2z+15+5=0

We add all the numbers together, and all the variables

5z+20=0

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

5z=-20

z=-20/5

z=-4

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