x.x+3=9

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Solution for x.x+3=9 equation: 



x.x+3=9

We move all terms to the left:

x.x+3-(9)=0

We add all the numbers together, and all the variables

x.x-6=0

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

x.x=6

x=6/1

x=6

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