21+2x=x+8

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Solution for 21+2x=x+8 equation: 



21+2x=x+8

We move all terms to the left:

21+2x-(x+8)=0

We get rid of parentheses

2x-x-8+21=0

We add all the numbers together, and all the variables

x+13=0

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

x=-13

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