![\left[\begin{array}{c}x\\y\\\end{array}\right]=\left[\begin{array}{cc}3 & -5 \\-1 & 2 \end{array}\right] \left[\begin{array}{c}15\\18\\\end{array}\right]](/tpl/images/0531/3040/0420c.png)
![\left[\begin{array}{cc}2&5\\1&3\\\end{array}\right] \left[\begin{array}{c}x\\y\\\end{array}\right]=\left[\begin{array}{c}15\\18\\\end{array}\right]](/tpl/images/0531/3040/9d3c9.png)
![A=\left[\begin{array}{cc}2&5\\1&3\\\end{array}\right] , X= \left[\begin{array}{c}x\\y\\\end{array}\right] \ \text{and} \ B =\left[\begin{array}{c}15\\18\\\end{array}\right]](/tpl/images/0531/3040/8d5ae.png)
– – – (1)![$A^{-1}=\frac{1}{a d-b c}\left[\begin{array}{cc}d & -b \\-c & a\end{array}\right]](/tpl/images/0531/3040/1fa67.png)
![$A^{-1}=\frac{1}{2\times 3-5 \times1}\left[\begin{array}{cc}3 & -5 \\-1 & 2 \end{array}\right]](/tpl/images/0531/3040/63fa1.png)
![$A^{-1}=\frac{1}{6-5 }\left[\begin{array}{cc}3 & -5 \\-1 & 2 \end{array}\right]](/tpl/images/0531/3040/b59c7.png)
![$A^{-1}=\frac{1}{1 }\left[\begin{array}{cc}3 & -5 \\-1 & 2 \end{array}\right]](/tpl/images/0531/3040/2eb9d.png)
![$A^{-1}=\left[\begin{array}{cc}3 & -5 \\-1 & 2 \end{array}\right]](/tpl/images/0531/3040/7b7e8.png)
Which matrix equation can be used to solve the system?
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