Question

The difference between two numbers is 3 and the difference of their square is 69. Find the numbers.

Answer 1

let the no be x and y

x - y = 3. ---- x = 3 + y (1)
x2 - y2 = 69 (2)

So substitute the value of x from (1) to (2)
u will get the value of x
then substitute in any equation u will get y


hope u have understood ...