2x+3(7+x)=31

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Solution for 2x+3(7+x)=31 equation: 



2x+3(7+x)=31

We move all terms to the left:

2x+3(7+x)-(31)=0

We add all the numbers together, and all the variables

2x+3(x+7)-31=0

We multiply parentheses

2x+3x+21-31=0

We add all the numbers together, and all the variables

5x-10=0

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

5x=10

x=10/5

x=2

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