7-7z=-9-9-2z

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Solution for 7-7z=-9-9-2z equation: 



7-7z=-9-9-2z

We move all terms to the left:

7-7z-(-9-9-2z)=0

We add all the numbers together, and all the variables

-7z-(-2z-18)+7=0

We get rid of parentheses

-7z+2z+18+7=0

We add all the numbers together, and all the variables

-5z+25=0

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

-5z=-25

z=-25/-5

z=+5

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