X+x-5=85

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Solution for X+x-5=85 equation: 



X+X-5=85

We move all terms to the left:

X+X-5-(85)=0

We add all the numbers together, and all the variables

2X-90=0

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

2X=90

X=90/2

X=45

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