X+85+x+105=90

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Solution for X+85+x+105=90 equation: 



X+85+X+105=90

We move all terms to the left:

X+85+X+105-(90)=0

We add all the numbers together, and all the variables

2X+100=0

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

2X=-100

X=-100/2

X=-50

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