The sum of two positive numbers is 60 and one number is four times the other . Find the smallest number .

Answer:
12
Step-by-step explanation:
let the big number be x, and small number be y
x + y = 60. ...(1)
x = 4y. ...(2)
now, put x in eq. 1
4y + y = 60
5y = 60
y = 60/5
y =12
thus, the smallest number is 12