Solve the System for X and Y Using Cramerʹs Rule $$x + a y = \frac { 1 } { a }$$

Multiple Choice

Solve the system for x and y using Cramerʹs rule. Assume a and b are nonzero constants.
- $$x + a y = \frac { 1 } { a }$$
$$x + b y = \frac { 1 } { b }$$

A) $\left\{ \left( b + a , - \frac { 1 } { a b } \right) \right\}$
B) $\left\{ \left( \frac { \mathrm { b } - \mathrm { a } } { \mathrm { ab } } , - \frac { 1 } { \mathrm { ab } } \right) \right\}$
C) $\left\{ \left( \frac { a + b } { a b } , - \frac { 1 } { a b } \right) \right\}$
D) $\left\{ \left( \frac { 1 } { a b } , \frac { a - b } { a b } \right) \right\}$