x+3(x-3)=x+3

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Solution for x+3(x-3)=x+3 equation: 



x+3(x-3)=x+3

We move all terms to the left:

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

We multiply parentheses

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

3x-12=0

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

3x=12

x=12/3

x=4

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