x+31+x=90

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Solution for x+31+x=90 equation: 



x+31+x=90

We move all terms to the left:

x+31+x-(90)=0

We add all the numbers together, and all the variables

2x-59=0

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

2x=59

x=59/2

x=29+1/2

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