20+10x=x-7

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Solution for 20+10x=x-7 equation: 



20+10x=x-7

We move all terms to the left:

20+10x-(x-7)=0

We get rid of parentheses

10x-x+7+20=0

We add all the numbers together, and all the variables

9x+27=0

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

9x=-27

x=-27/9

x=-3

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