3x+5+x+31=90

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Solution for 3x+5+x+31=90 equation: 



3x+5+x+31=90

We move all terms to the left:

3x+5+x+31-(90)=0

We add all the numbers together, and all the variables

4x-54=0

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

4x=54

x=54/4

x=13+1/2

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