12x-18=13x+16=-90

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Solution for 12x-18=13x+16=-90 equation: 



12x-18=13x+16=-90

We move all terms to the left:

12x-18-(13x+16)=0

We get rid of parentheses

12x-13x-16-18=0

We add all the numbers together, and all the variables

-1x-34=0

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

-x=34

x=34/-1

x=-34

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