3r+2r+r=180

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Solution for 3r+2r+r=180 equation:



3r+2r+r=180
We move all terms to the left:
3r+2r+r-(180)=0
We add all the numbers together, and all the variables
6r-180=0
We move all terms containing r to the left, all other terms to the right
6r=180
r=180/6
r=30

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