Question

One number is 3 times as big as another number. If the difference between these two numbers is 60 then what is the larger number?

Answer 1

x = larger number
y = smaller number

x = 3y
x - y = 60

Substitution Method:

3y - y = 60
2y = 60
2y/2 = 60/2
y = 30

Solve for x

x = 3(30)
x = 90

90 - 30 = 60