2x-21+3x=-2x+21

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Solution for 2x-21+3x=-2x+21 equation: 



2x-21+3x=-2x+21

We move all terms to the left:

2x-21+3x-(-2x+21)=0

We add all the numbers together, and all the variables

5x-(-2x+21)-21=0

We get rid of parentheses

5x+2x-21-21=0

We add all the numbers together, and all the variables

7x-42=0

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

7x=42

x=42/7

x=6

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