9x+12=-8x-18

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Solution for 9x+12=-8x-18 equation: 



9x+12=-8x-18

We move all terms to the left:

9x+12-(-8x-18)=0

We get rid of parentheses

9x+8x+18+12=0

We add all the numbers together, and all the variables

17x+30=0

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

17x=-30

x=-30/17

x=-1+13/17

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