10r+30=180

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Solution for 10r+30=180 equation: 



10r+30=180

We move all terms to the left:

10r+30-(180)=0

We add all the numbers together, and all the variables

10r-150=0

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

10r=150

r=150/10

r=15

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