21x-17+15x+31=90

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Solution for 21x-17+15x+31=90 equation: 



21x-17+15x+31=90

We move all terms to the left:

21x-17+15x+31-(90)=0

We add all the numbers together, and all the variables

36x-76=0

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

36x=76

x=76/36

x=2+1/9

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