(x-4)+(x+5)=5x-20

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Solution for (x-4)+(x+5)=5x-20 equation: 



(x-4)+(x+5)=5x-20

We move all terms to the left:

(x-4)+(x+5)-(5x-20)=0

We get rid of parentheses

x+x-5x-4+5+20=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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