terryg752
Nov 8, 2007, 06:41 PM
-2=4r+s
4r + s = -2
s = -2 - 4r
nycfunction
Nov 11, 2007, 09:24 AM
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