8x+12-x=3x-9

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Solution for 8x+12-x=3x-9 equation: 



8x+12-x=3x-9

We move all terms to the left:

8x+12-x-(3x-9)=0

We add all the numbers together, and all the variables

7x-(3x-9)+12=0

We get rid of parentheses

7x-3x+9+12=0

We add all the numbers together, and all the variables

4x+21=0

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

4x=-21

x=-21/4

x=-5+1/4

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