5r+2r=r-3(6+r)

Solution for 5r+2r=r-3(6+r) equation:

5r+2r=r-3(6+r)

We move all terms to the left:

5r+2r-(r-3(6+r))=0

We add all the numbers together, and all the variables

5r+2r-(r-3(r+6))=0

We add all the numbers together, and all the variables

7r-(r-3(r+6))=0


We calculate terms in parentheses: -(r-3(r+6)), so:

r-3(r+6)

We multiply parentheses

r-3r-18

We add all the numbers together, and all the variables

-2r-18

Back to the equation:

-(-2r-18)


We get rid of parentheses

7r+2r+18=0

We add all the numbers together, and all the variables

9r+18=0

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

9r=-18

r=-18/9

r=-2