7x-12-4x=9+8x+4

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Solution for 7x-12-4x=9+8x+4 equation: 



7x-12-4x=9+8x+4

We move all terms to the left:

7x-12-4x-(9+8x+4)=0

We add all the numbers together, and all the variables

7x-4x-(8x+13)-12=0

We add all the numbers together, and all the variables

3x-(8x+13)-12=0

We get rid of parentheses

3x-8x-13-12=0

We add all the numbers together, and all the variables

-5x-25=0

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

-5x=25

x=25/-5

x=-5

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