21x+7=-10x-20

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Solution for 21x+7=-10x-20 equation: 



21x+7=-10x-20

We move all terms to the left:

21x+7-(-10x-20)=0

We get rid of parentheses

21x+10x+20+7=0

We add all the numbers together, and all the variables

31x+27=0

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

31x=-27

x=-27/31

x=-27/31

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