4(r+15)=100

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Solution for 4(r+15)=100 equation: 



4(r+15)=100

We move all terms to the left:

4(r+15)-(100)=0

We multiply parentheses

4r+60-100=0

We add all the numbers together, and all the variables

4r-40=0

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

4r=40

r=40/4

r=10

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