2(r+5)-3=15

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Solution for 2(r+5)-3=15 equation: 



2(r+5)-3=15

We move all terms to the left:

2(r+5)-3-(15)=0

We add all the numbers together, and all the variables

2(r+5)-18=0

We multiply parentheses

2r+10-18=0

We add all the numbers together, and all the variables

2r-8=0

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

2r=8

r=8/2

r=4

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