(2x+x)=30

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



(2x+x)=30

We move all terms to the left:

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

We add all the numbers together, and all the variables

(+3x)-30=0

We get rid of parentheses

3x-30=0

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

3x=30

x=30/3

x=10

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