(5x+4)+(4x+5)=90

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Solution for (5x+4)+(4x+5)=90 equation: 



(5x+4)+(4x+5)=90

We move all terms to the left:

(5x+4)+(4x+5)-(90)=0

We get rid of parentheses

5x+4x+4+5-90=0

We add all the numbers together, and all the variables

9x-81=0

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

9x=81

x=81/9

x=9

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