(X-3)+(8x+21)=180

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Solution for (X-3)+(8x+21)=180 equation: 



(X-3)+(8X+21)=180

We move all terms to the left:

(X-3)+(8X+21)-(180)=0

We get rid of parentheses

X+8X-3+21-180=0

We add all the numbers together, and all the variables

9X-162=0

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

9X=162

X=162/9

X=18

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