ANY numbers will do! Putting any 2 numbers in for s will give two equations for A and B. For example, if s= 0, A(0+ 9)+ B(0+ 4)= 0+ 8 or 9A+ B= 8. If s= 1, A(1+ 9)+ B(1+ 4)= 1+ 8 or 10A+ 5B= 9.
The coefficient of is A+ B on one side, 1 on the other: you must have A+ B= 1. The coefficient of s is 0 on both sides (whew!). The constant term is 9A+ 4B on one side and 8 on the other. You must have 9A+ 4B= 8.
Last edited by HallsofIvy; May 1st 2009 at 04:22 AM.