9x+12x=-8x-16

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Solution for 9x+12x=-8x-16 equation: 



9x+12x=-8x-16

We move all terms to the left:

9x+12x-(-8x-16)=0

We add all the numbers together, and all the variables

21x-(-8x-16)=0

We get rid of parentheses

21x+8x+16=0

We add all the numbers together, and all the variables

29x+16=0

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

29x=-16

x=-16/29

x=-16/29

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