solve using cramer's rule
posted by Anonymous on .
solve using cramer's rule
3x+4y=1
5x2y=4

First calculate the determinant D of
3 4
5 2
=3*(2)4*5=26
Replace the first column by the RHS,and calculate determinant D1
1 4
4 2
=(1)(2)4*4
=14
Replace the column with the RHS and calculate determinant D2
3 1
5 4
=3*4(1)*5
=17
x=D1/D=14/26=7/13
y=D2/D=17/26=17/26