(2x+21)+(2x-45)=180

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Solution for (2x+21)+(2x-45)=180 equation: 



(2x+21)+(2x-45)=180

We move all terms to the left:

(2x+21)+(2x-45)-(180)=0

We get rid of parentheses

2x+2x+21-45-180=0

We add all the numbers together, and all the variables

4x-204=0

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

4x=204

x=204/4

x=51

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