8z-7=9z-4

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Solution for 8z-7=9z-4 equation: 



8z-7=9z-4

We move all terms to the left:

8z-7-(9z-4)=0

We get rid of parentheses

8z-9z+4-7=0

We add all the numbers together, and all the variables

-1z-3=0

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

-z=3

z=3/-1

z=-3

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