9x+12=-9x-20

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Solution for 9x+12=-9x-20 equation: 



9x+12=-9x-20

We move all terms to the left:

9x+12-(-9x-20)=0

We get rid of parentheses

9x+9x+20+12=0

We add all the numbers together, and all the variables

18x+32=0

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

18x=-32

x=-32/18

x=-1+7/9

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