3(x+10)+x=9+x

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Solution for 3(x+10)+x=9+x equation: 



3(x+10)+x=9+x

We move all terms to the left:

3(x+10)+x-(9+x)=0

We add all the numbers together, and all the variables

3(x+10)+x-(x+9)=0

We add all the numbers together, and all the variables

x+3(x+10)-(x+9)=0

We multiply parentheses

x+3x-(x+9)+30=0

We get rid of parentheses

x+3x-x-9+30=0

We add all the numbers together, and all the variables

3x+21=0

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

3x=-21

x=-21/3

x=-7

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