9x+12x=9x-16

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



9x+12x=9x-16

We move all terms to the left:

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

We add all the numbers together, and all the variables

21x-(9x-16)=0

We get rid of parentheses

21x-9x+16=0

We add all the numbers together, and all the variables

12x+16=0

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

12x=-16

x=-16/12

x=-1+1/3

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