Question

A number is 2/5 times another number.if their sum is 70 .find tha no.

Answer 1

Define x:

Let one number be x

The other number is 2/5 x.

Solve x:

Their sum is 70

x + 2/5 x = 70

7/5 x = 70

7x = 70 x 5

7x = 350

x = 50

Find the numbers:

one number = x = 50

other number = 2/5 x = 2/5 (50) = 20

Answer: The numbers are 50 and 20.

Answer 2

Let another no. Be=x
So one number will be=2x/5
Now, 2x/5 + x = 70
After taking LCM
7x/5 = 5
7x = 25
X = 25/7