x+3x-1x+1=90

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Solution for x+3x-1x+1=90 equation: 



x+3x-1x+1=90

We move all terms to the left:

x+3x-1x+1-(90)=0

We add all the numbers together, and all the variables

3x-89=0

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

3x=89

x=89/3

x=29+2/3

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