12+15+2x=20+x

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Solution for 12+15+2x=20+x equation: 



12+15+2x=20+x

We move all terms to the left:

12+15+2x-(20+x)=0

We add all the numbers together, and all the variables

2x-(x+20)+12+15=0

We add all the numbers together, and all the variables

2x-(x+20)+27=0

We get rid of parentheses

2x-x-20+27=0

We add all the numbers together, and all the variables

x+7=0

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

x=-7

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