-2=4r+s

-2=4r+s

4r + s = -2

s = -2 - 4r

Question:

Isolate s for the linear equation -2 = 4r + s

To get a letter alone means to isolate the letter. So, to do this, simply subtract -4r from both sides of the equation.

On the left side we get -2 - 4r and on the right side we get 4r - 4r + s.

Notice that on the right side 4r and -4r cancel each other out because a positive and negative cancel each other out. So, s is left alone on the right side of the equation.

Final answer: -2 - 4r = s