(x-5)+(2x-1)=21

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Solution for (x-5)+(2x-1)=21 equation: 



(x-5)+(2x-1)=21

We move all terms to the left:

(x-5)+(2x-1)-(21)=0

We get rid of parentheses

x+2x-5-1-21=0

We add all the numbers together, and all the variables

3x-27=0

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

3x=27

x=27/3

x=9

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