-5x=90+13x

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



-5x=90+13x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-5x-13x-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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