(7x+31)+(21x-19)=180.

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Solution for (7x+31)+(21x-19)=180. equation: 



(7x+31)+(21x-19)=180.

We move all terms to the left:

(7x+31)+(21x-19)-(180.)=0

We add all the numbers together, and all the variables

(7x+31)+(21x-19)-180=0

We get rid of parentheses

7x+21x+31-19-180=0

We add all the numbers together, and all the variables

28x-168=0

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

28x=168

x=168/28

x=6

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