Question

One number is 3 less than a second number. Twice the second number is 15 less than 5 times the first. Find the two numbers.

Answer 1

7 and 10

Explanation:

let x and y be our unknown numbers

x = y - 3

2 y = 5x - 15

....

2y = 5 ( y - 3) - 15

2y = 5y - 15 - 15

-3y = -30

y = 10

x = 10 - 3 = 7