r+4r=10

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Solution for r+4r=10 equation: 



r+4r=10

We move all terms to the left:

r+4r-(10)=0

We add all the numbers together, and all the variables

5r-10=0

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

5r=10

r=10/5

r=2

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