3x-4+31=90

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Solution for 3x-4+31=90 equation: 



3x-4+31=90

We move all terms to the left:

3x-4+31-(90)=0

We add all the numbers together, and all the variables

3x-63=0

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

3x=63

x=63/3

x=21

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