How do you solve 12= - r - 5r?

3 Answers
Sep 29, 2017

r=-2

Explanation:

First we begin by simplifying the right side. Notice how -r and -5r are actually like terms with -r having a -1 as a coefficient. And so, we can combine these two terms:

12=-color(blue)1r-5r

12=-6r

Now we can solve for r by dividing both sides by -6

12/color(red)(-6)=cancel(-6)/cancelcolor(red)(-6)r

-2=r

Sep 29, 2017

r=-2

Explanation:

12 = -r-5r
12 = -6r
Flip the equation
-6r = 12
Divide both sides by -6
(-6r)/(-6)=12/(-6)
r = -2

Sep 29, 2017

r=-2

Explanation:

(-r-5r)=12
-(r+5r)=12
(r+5r)=-12
6r=-12
r=-12/6
r=-2