x+3+x=3x

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Solution for x+3+x=3x equation: 



x+3+x=3x

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1x+3=0

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

-x=-3

x=-3/-1

x=+3

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