Solve the System for X and Y Using Cramer's Rule $$\begin{array} { l } a ^ { 2 } x + b ^ { 2 } y = b ^ { 2 } \\a x + b y = a\end{array}$$

Multiple Choice

Solve the system for x and y using Cramer's rule. Assume a and b are nonzero constants.
- $$\begin{array} { l } a ^ { 2 } x + b ^ { 2 } y = b ^ { 2 } \\a x + b y = a\end{array}$$

A) $\left\{ \left( \frac { b } { a } , \frac { a + b } { b } \right) \right\}$

B) $\left\{ \left\{ \frac { a } { b } , \frac { a - b } { b } \right) \right\}$

C) $\left\{ \left( \frac { \mathrm { b } } { \mathrm { a } } , \frac { \mathrm { a } - \mathrm { b } } { \mathrm { b } } \right) \right\}$

D) $\left\{ \left\{ - \frac { b } { a } , \frac { a + b } { b } \right) \right\}$