Two numbers

We have two numbers. Their sum is 140. One-fifth of the first number is equal to half the second number. Determine those unknown numbers.

Correct answer:

x =  100
y =  40

Step-by-step explanation:


x+y=140
x/5 = y/2

x+y = 140
2x-5y = 0

x = 100
y = 40

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Showing 2 comments:
#
Math student
I just took x as 40 and y as 100 and it says I'm wrong :(

#
Dr Math
Please read again: One-fifth of the first number is equal to half the second .... 40/5 is not equal 100/2

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