2r=-3(1+r)+18

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Solution for 2r=-3(1+r)+18 equation: 



2r=-3(1+r)+18

We move all terms to the left:

2r-(-3(1+r)+18)=0

We add all the numbers together, and all the variables

2r-(-3(r+1)+18)=0



We calculate terms in parentheses: -(-3(r+1)+18), so:

-3(r+1)+18

We multiply parentheses

-3r-3+18

We add all the numbers together, and all the variables

-3r+15

Back to the equation:

-(-3r+15)



We get rid of parentheses

2r+3r-15=0

We add all the numbers together, and all the variables

5r-15=0

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

5r=15

r=15/5

r=3

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