(7x-21)+(9x+1)=180

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Solution for (7x-21)+(9x+1)=180 equation: 



(7x-21)+(9x+1)=180

We move all terms to the left:

(7x-21)+(9x+1)-(180)=0

We get rid of parentheses

7x+9x-21+1-180=0

We add all the numbers together, and all the variables

16x-200=0

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

16x=200

x=200/16

x=12+1/2

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