4z+13=9z-7

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Solution for 4z+13=9z-7 equation: 



4z+13=9z-7

We move all terms to the left:

4z+13-(9z-7)=0

We get rid of parentheses

4z-9z+7+13=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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