How do you solve -2r - 11= 112r11=11?

1 Answer
Jan 1, 2017

color(brown)"r = -11"r = -11

Explanation:

color(magenta)("Add 11 to both sides:")Add 11 to both sides:

-2r-cancel11= 11
color(white)(aaaa)+cancel11 color(white)(a) +11

11 cancels out on the left side, and when you add 11 to 11 on the right you get 22:

-2 r = 22

color(blue)("Divide both sides by -2 to get r by itself.")

(cancel"-2"r)/cancel"-2"=(22)/-2

Now you are just left with r on the left side and -11 on the right side.

Thus,
color(brown)"r = -11"