2x+3x=21+8x

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Solution for 2x+3x=21+8x equation: 



2x+3x=21+8x

We move all terms to the left:

2x+3x-(21+8x)=0

We add all the numbers together, and all the variables

2x+3x-(8x+21)=0

We add all the numbers together, and all the variables

5x-(8x+21)=0

We get rid of parentheses

5x-8x-21=0

We add all the numbers together, and all the variables

-3x-21=0

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

-3x=21

x=21/-3

x=-7

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