(13x-1)+(9x+3)=90

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Solution for (13x-1)+(9x+3)=90 equation: 



(13x-1)+(9x+3)=90

We move all terms to the left:

(13x-1)+(9x+3)-(90)=0

We get rid of parentheses

13x+9x-1+3-90=0

We add all the numbers together, and all the variables

22x-88=0

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

22x=88

x=88/22

x=4

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