3-(2r+5)=-12

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Solution for 3-(2r+5)=-12 equation: 



3-(2r+5)=-12

We move all terms to the left:

3-(2r+5)-(-12)=0

We add all the numbers together, and all the variables

-(2r+5)+15=0

We get rid of parentheses

-2r-5+15=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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