7=-7+z

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Solution for 7=-7+z equation: 



7=-7+z

We move all terms to the left:

7-(-7+z)=0

We add all the numbers together, and all the variables

-(z-7)+7=0

We get rid of parentheses

-z+7+7=0

We add all the numbers together, and all the variables

-1z+14=0

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

-z=-14

z=-14/-1

z=+14

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