Question

One positive number is 9 times another positive number. The difference between the two numbers is 128. Find the two numbers.

Answer 1

To solve this X=9y X-y=128 9y-y=128 8y = 128 y = 128/8=16 ------------- Substite into x=9y to solve for "x": x = 9*16 = 144

Answer 2

To solve this
⇒ X=9y
⇒ X-y=128
⇒ 9y - y=128
⇒8y = 128
⇒ y = 128/8=16
 Substitute into x=9y to solve for "x": x = 9*16 = 144