4r+2r=30

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Solution for 4r+2r=30 equation: 



4r+2r=30

We move all terms to the left:

4r+2r-(30)=0

We add all the numbers together, and all the variables

6r-30=0

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

6r=30

r=30/6

r=5

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