2(x+5)+x=21

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Solution for 2(x+5)+x=21 equation: 



2(x+5)+x=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

x+2x+10-21=0

We add all the numbers together, and all the variables

3x-11=0

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

3x=11

x=11/3

x=3+2/3

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