Answer:
B. 10 E. 20 C. 60
Step-by-step explanation:
s = 2f
t = 2(f + s)
(15 + 15 + 30 + f + s + t)/6 = 25 This equation and the equations above show how the variables relate to each other
f = 10 The first number is 10
s = 2(10)=20 The second number is 20
t = 2(10 + 20) = 60 The third number is 60
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