8x+9-12x=4x-12-5x

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Solution for 8x+9-12x=4x-12-5x equation: 



8x+9-12x=4x-12-5x

We move all terms to the left:

8x+9-12x-(4x-12-5x)=0

We add all the numbers together, and all the variables

8x-12x-(-1x-12)+9=0

We add all the numbers together, and all the variables

-4x-(-1x-12)+9=0

We get rid of parentheses

-4x+1x+12+9=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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