5x+21=-2x-15+9x

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Solution for 5x+21=-2x-15+9x equation: 



5x+21=-2x-15+9x

We move all terms to the left:

5x+21-(-2x-15+9x)=0

We add all the numbers together, and all the variables

5x-(7x-15)+21=0

We get rid of parentheses

5x-7x+15+21=0

We add all the numbers together, and all the variables

-2x+36=0

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

-2x=-36

x=-36/-2

x=+18

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