21=5x+3-2

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Solution for 21=5x+3-2 equation: 



21=5x+3-2

We move all terms to the left:

21-(5x+3-2)=0

We add all the numbers together, and all the variables

-(5x+1)+21=0

We get rid of parentheses

-5x-1+21=0

We add all the numbers together, and all the variables

-5x+20=0

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

-5x=-20

x=-20/-5

x=+4

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