2(r+15)=40

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Solution for 2(r+15)=40 equation: 



2(r+15)=40

We move all terms to the left:

2(r+15)-(40)=0

We multiply parentheses

2r+30-40=0

We add all the numbers together, and all the variables

2r-10=0

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

2r=10

r=10/2

r=5

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