Question 146738
3x + 4y = 11
x + 3y = 2
3  4  -11
1  3   -2
Find the Determinant.
3  4 
1  3
= 3*3-1*4
= 5
Ignore the x column
4  -11
3   -2
= 4*-2-(3*-11)
= 25
So x is 25/5
x = 5
Ignore the y column
3  -11
1   -2
= -(3*-2-(1*-11))
= -5
So y = -1