-4=7+-z

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Solution for -4=7+-z equation: 



-4=7+-z

We move all terms to the left:

-4-(7+-z)=0

We add all the numbers together, and all the variables

-(-1z)-4=0

We get rid of parentheses

1z-4=0

We add all the numbers together, and all the variables

z-4=0

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

z=4

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