X+45+2x=90

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Solution for X+45+2x=90 equation: 



X+45+2X=90

We move all terms to the left:

X+45+2X-(90)=0

We add all the numbers together, and all the variables

3X-45=0

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

3X=45

X=45/3

X=15

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