9z-(-11z)+-18z-9z=-7

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Solution for 9z-(-11z)+-18z-9z=-7 equation: 



9z-(-11z)+-18z-9z=-7

We move all terms to the left:

9z-(-11z)+-18z-9z-(-7)=0

We add all the numbers together, and all the variables

-18z-(-11z)+7=0

We get rid of parentheses

-18z+11z+7=0

We add all the numbers together, and all the variables

-7z+7=0

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

-7z=-7

z=-7/-7

z=1

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