3(5+r)=12-8(r+1)

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Solution for 3(5+r)=12-8(r+1) equation: 



3(5+r)=12-8(r+1)

We move all terms to the left:

3(5+r)-(12-8(r+1))=0

We add all the numbers together, and all the variables

3(r+5)-(12-8(r+1))=0

We multiply parentheses

3r-(12-8(r+1))+15=0



We calculate terms in parentheses: -(12-8(r+1)), so:

12-8(r+1)

determiningTheFunctionDomain
-8(r+1)+12

We multiply parentheses

-8r-8+12

We add all the numbers together, and all the variables

-8r+4

Back to the equation:

-(-8r+4)



We get rid of parentheses

3r+8r-4+15=0

We add all the numbers together, and all the variables

11r+11=0

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

11r=-11

r=-11/11

r=-1

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