Question

a number is 2/5 time another number if the their sum is 70 find the number

Answer 1

let the first number be x and second number be y.
according to first condition X =2y/5
according to second condition x+y=70
by solving both we get
7y/5=70
7y=70*5
y=70*5/7
y=50
putting the value of Y in equation number first.
x=2*50/5
x=20.

Answer 2

Let the no. be =x
A.T.C
x+2/5x=70
5x+2x/5=70
x=50
the no. is 2/5*50=20