9+9+15+15=4+4+x+x

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Solution for 9+9+15+15=4+4+x+x equation: 



9+9+15+15=4+4+x+x

We move all terms to the left:

9+9+15+15-(4+4+x+x)=0

We add all the numbers together, and all the variables

-(2x+8)+9+9+15+15=0

We add all the numbers together, and all the variables

-(2x+8)+48=0

We get rid of parentheses

-2x-8+48=0

We add all the numbers together, and all the variables

-2x+40=0

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

-2x=-40

x=-40/-2

x=+20

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