Posted by Tim on Wednesday, February 20, 2008 at 3:29pm.
P + R = 89
R + S = 85
You need a third equation to solve for all three unknowns. Is that the only information you were given?
RANDY AND SIMON TOGETHER HAD 80
That disagrees with you previous statement "RANDY AND SIMON TOGETHER HAD 85"
When you finally get three independent statements stated as equations, then use algebra to solve them.
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