5(r+4)-7r=-165(r+4)-7r=-16

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Solution for 5(r+4)-7r=-165(r+4)-7r=-16 equation: 



5(r+4)-7r=-165(r+4)-7r=-16

We move all terms to the left:

5(r+4)-7r-(-165(r+4)-7r)=0

We add all the numbers together, and all the variables

-7r+5(r+4)-(-165(r+4)-7r)=0

We multiply parentheses

-7r+5r-(-165(r+4)-7r)+20=0



We calculate terms in parentheses: -(-165(r+4)-7r), so:

-165(r+4)-7r

We add all the numbers together, and all the variables

-7r-165(r+4)

We multiply parentheses

-7r-165r-660

We add all the numbers together, and all the variables

-172r-660

Back to the equation:

-(-172r-660)



We add all the numbers together, and all the variables

-2r-(-172r-660)+20=0

We get rid of parentheses

-2r+172r+660+20=0

We add all the numbers together, and all the variables

170r+680=0

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

170r=-680

r=-680/170

r=-4

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