(2x-21)+x=180

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Solution for (2x-21)+x=180 equation: 



(2x-21)+x=180

We move all terms to the left:

(2x-21)+x-(180)=0

We add all the numbers together, and all the variables

x+(2x-21)-180=0

We get rid of parentheses

x+2x-21-180=0

We add all the numbers together, and all the variables

3x-201=0

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

3x=201

x=201/3

x=67

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