Question

If two numbers are in the ratio of 6 : 11 and their difference is 15, what is the last number?

Answer 1

$x:y = 6:11$

$x - y = 15$

$x = 6a$

$y = 11a$

$6a - 11a = 15$

$- 5a = 15$

$a = - 3$

$y = 11 \times - 3$

$y = - 33$

$last \: number = - 33$