9x+3x=4x-8

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Solution for 9x+3x=4x-8 equation: 



9x+3x=4x-8

We move all terms to the left:

9x+3x-(4x-8)=0

We add all the numbers together, and all the variables

12x-(4x-8)=0

We get rid of parentheses

12x-4x+8=0

We add all the numbers together, and all the variables

8x+8=0

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

8x=-8

x=-8/8

x=-1

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