21x-72=-x

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Solution for 21x-72=-x equation: 



21x-72=-x

We move all terms to the left:

21x-72-(-x)=0

We add all the numbers together, and all the variables

21x-(-1x)-72=0

We get rid of parentheses

21x+1x-72=0

We add all the numbers together, and all the variables

22x-72=0

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

22x=72

x=72/22

x=3+3/11

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