-4=z-3z

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Solution for -4=z-3z equation: 



-4=z-3z

We move all terms to the left:

-4-(z-3z)=0

We add all the numbers together, and all the variables

-(-2z)-4=0

We get rid of parentheses

2z-4=0

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

2z=4

z=4/2

z=2

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