SOLUTION: he sum of two number is 70. the first number is 2/5 of the second number. what are the numbers?

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Question 957709: he sum of two number is 70. the first number is 2/5 of the second number. what are the numbers?
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
S=second number; F=first number=(2/5)S
F%2BS=70 Substitute for F.
%282%2F5%29S%2BS=70
%287%2F5%29S=70 Multiply each side by 5/7.
S=50 ANSWER 1:The second number is 50.
F=%282%2F5%29S
F=%282%2F5%2950
F=20 ANSWER 2: The first number is 20