9+4x=-12+5x

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



9+4x=-12+5x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

4x-5x+12+9=0

We add all the numbers together, and all the variables

-1x+21=0

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

-x=-21

x=-21/-1

x=+21

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