7r+40=180

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Solution for 7r+40=180 equation: 



7r+40=180

We move all terms to the left:

7r+40-(180)=0

We add all the numbers together, and all the variables

7r-140=0

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

7r=140

r=140/7

r=20

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