Question

Solve the following pair of equations by cross - multiplication method.

x – y = a + b

ax + by = a² – b²

Answer 1

Given, pair of equations is

x – y = a + b ⇒ x – y –(a + b) = 0

ax + by = a² –b²⇒ ax + by – (a² –b² ) = 0

By cross – multiplication method, we have