9x=-7x-128

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Solution for 9x=-7x-128 equation: 



9x=-7x-128

We move all terms to the left:

9x-(-7x-128)=0

We get rid of parentheses

9x+7x+128=0

We add all the numbers together, and all the variables

16x+128=0

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

16x=-128

x=-128/16

x=-8

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