Question 884919
D = .15S
R = 3D
Therefore, R = .45S
L = .75S
D + R + L + S = 141
Substitute the known values into the bottom equation.
D + R + L + S = 141
(.15S) + (.45S) + (.75S) + S = 141
Add
2.35S = 141
Divide each side by 2.35
S = 60
.
If Sara is 60, then Daniel is 15% of 60, or 9
Rachel is 3 times as old as Daniel, or 27
Luke is 75% of Sara's age, or 45
Add them together to prove:
60+9+27+45 = 141
Success!