Question

7x+3y=15 ; 12y-5x=39. Solve this equations by Cramer’s method.

Answer 1

x = | B1 |/| A |

x = 63/99

x = 7/11

y = | B2 |/| A |

y = 348/99

I hope this helps you.

: )

Answer 2

Answer:

(7/11 , 116/33)

Step-by-step explanation:

Given 7x+3y=15 ; 12y-5x=39. Solve this equations by Cramer’s method.

Now applying Crammer's rule we get

W =  7    3

      -5    12    

= 7 x 12 - (-5) x 3

=  84 + 15 = 99

W 1 = 15   3

         39  12    

= 15 x 12 - 39 x 3

 = 180 - 117 = 63

W 2 =   7    15

           - 5     39  

= 7 x 39 - (-5) x 15

=  273 + 75 = 348

x = W 1 / W = 63 /99 = 7/11

y = W 2 / W = 348 / 99 = 116/33

So it will be (7/11 , 116/33)