9x+12x=-8x+7x

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Solution for 9x+12x=-8x+7x equation: 



9x+12x=-8x+7x

We move all terms to the left:

9x+12x-(-8x+7x)=0

We add all the numbers together, and all the variables

9x+12x-(-1x)=0

We add all the numbers together, and all the variables

21x-(-1x)=0

We get rid of parentheses

21x+1x=0

We add all the numbers together, and all the variables

22x=0

x=0/22

x=0

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