13x+5x=-90

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Solution for 13x+5x=-90 equation: 



13x+5x=-90

We move all terms to the left:

13x+5x-(-90)=0

We add all the numbers together, and all the variables

18x+90=0

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

18x=-90

x=-90/18

x=-5

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