13x+23x=90

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Solution for 13x+23x=90 equation: 



13x+23x=90

We move all terms to the left:

13x+23x-(90)=0

We add all the numbers together, and all the variables

36x-90=0

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

36x=90

x=90/36

x=2+1/2

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