Mathematics, 18.01.2021 14:00 rhlalbin
Apply Crammer's Rule to find the solution to the following quations .2x + 3y = 1, 3x + y = 5
Answers: 1
![\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] =\left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}1\\5\end{array}\right]](/tpl/images/1043/1132/b858a.png)
![x=\frac{\left[\begin{array}{ccc}1&3\\5&1\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(1*1)-(5*3)}{(2*1)-(3*3)} = \frac{1-15}{2-9} =\frac{-14}{-7} = 2](/tpl/images/1043/1132/de194.png)
![y=\frac{\left[\begin{array}{ccc}2&1\\3&5\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(2*5)-(3*1)}{(2*1)-(3*3)}=\frac{10-3}{2-9} =\frac{7}{-7}=-1](/tpl/images/1043/1132/5d0ab.png)
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Apply Crammer's Rule to find the solution to the following quations .2x + 3y = 1, 3x + y = 5...
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