X+15+x=85

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Solution for X+15+x=85 equation: 



X+15+X=85

We move all terms to the left:

X+15+X-(85)=0

We add all the numbers together, and all the variables

2X-70=0

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

2X=70

X=70/2

X=35

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