3x+(2x+1)=21=180

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Solution for 3x+(2x+1)=21=180 equation: 



3x+(2x+1)=21=180

We move all terms to the left:

3x+(2x+1)-(21)=0

We get rid of parentheses

3x+2x+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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