-90=-6x-12

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Solution for -90=-6x-12 equation: 



-90=-6x-12

We move all terms to the left:

-90-(-6x-12)=0

We get rid of parentheses

6x+12-90=0

We add all the numbers together, and all the variables

6x-78=0

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

6x=78

x=78/6

x=13

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