5x-2x=21+x-20

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Solution for 5x-2x=21+x-20 equation: 



5x-2x=21+x-20

We move all terms to the left:

5x-2x-(21+x-20)=0

We add all the numbers together, and all the variables

5x-2x-(x+1)=0

We add all the numbers together, and all the variables

3x-(x+1)=0

We get rid of parentheses

3x-x-1=0

We add all the numbers together, and all the variables

2x-1=0

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

2x=1

x=1/2

x=1/2

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