20-2x-x=15-7x

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Solution for 20-2x-x=15-7x equation: 



20-2x-x=15-7x

We move all terms to the left:

20-2x-x-(15-7x)=0

We add all the numbers together, and all the variables

-2x-x-(-7x+15)+20=0

We add all the numbers together, and all the variables

-3x-(-7x+15)+20=0

We get rid of parentheses

-3x+7x-15+20=0

We add all the numbers together, and all the variables

4x+5=0

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

4x=-5

x=-5/4

x=-1+1/4

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