X+45+x+55=90

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Solution for X+45+x+55=90 equation: 



X+45+X+55=90

We move all terms to the left:

X+45+X+55-(90)=0

We add all the numbers together, and all the variables

2X+10=0

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

2X=-10

X=-10/2

X=-5

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