Question

using cramers rule 2x+y=3,-x+3y=7​

Answer 1

Answer:

x=2/7, y= 17/7

Step-by-step explanation:

please look at picture.

Answer 2

Answer:

Step-by-step explanation:

2x+y=3

-x+3y=7​

Using Carmer's rule

$D=\begin{vmatrix} 2& 1\\ -1 & 3\end{vmatrix}=6+1=7\\\\Dx=\begin{vmatrix} 3& 1\\ 7 & 3\end{vmatrix}=9-7=2\\\\Dy=\begin{vmatrix} 2& 3\\ -1 & 7\end{vmatrix}=14+3=17\\\\\bf x=\frac{D_x}{D} =\frac{2}{7} \\\\ y=\frac{D_y}{D} =\frac{17}{7}$