2z-4=3z-21

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Solution for 2z-4=3z-21 equation: 



2z-4=3z-21

We move all terms to the left:

2z-4-(3z-21)=0

We get rid of parentheses

2z-3z+21-4=0

We add all the numbers together, and all the variables

-1z+17=0

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

-z=-17

z=-17/-1

z=+17

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