x+12+2x-3=90

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Solution for x+12+2x-3=90 equation: 



x+12+2x-3=90

We move all terms to the left:

x+12+2x-3-(90)=0

We add all the numbers together, and all the variables

3x-81=0

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

3x=81

x=81/3

x=27

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