X+3+x+3=15

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Solution for X+3+x+3=15 equation: 



X+3+X+3=15

We move all terms to the left:

X+3+X+3-(15)=0

We add all the numbers together, and all the variables

2X-9=0

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

2X=9

X=9/2

X=4+1/2

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