Alan is \(2 {1 \over 2}\frac{}{}\)times as heavy as Binod. Binod is 7 kg lighter than Glen. The total mass of the 3 boys is 142 kg. What is Glen's mass?
a = 2.5 b
g = b-7
b summed = 142
2.5b + b-7 + b = 142 solve for b... then g = b-7
A = 2.5(G-7)
B = G-7
G = G ()
2.5(G-7) + G-7 + G = 142
G => 37 kg
A => 75 kg
B => 30 kg
b = g-7 so a = 2.5 (g-7)
g summed = 142
2.5(g-7) + g-7 + g = 142 solve for g... *** edited ***
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