2(2x+3)=21-x

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



2(2x+3)=21-x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

4x-(-1x+21)+6=0

We get rid of parentheses

4x+1x-21+6=0

We add all the numbers together, and all the variables

5x-15=0

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

5x=15

x=15/5

x=3

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