2(x+3)+x=30

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Solution for 2(x+3)+x=30 equation: 



2(x+3)+x=30

We move all terms to the left:

2(x+3)+x-(30)=0

We add all the numbers together, and all the variables

x+2(x+3)-30=0

We multiply parentheses

x+2x+6-30=0

We add all the numbers together, and all the variables

3x-24=0

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

3x=24

x=24/3

x=8

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