1.

4) What is the value of Dx forsolving simultaneous equations3x + 2y = -11 and 7x - 4y = 9 byCramer's rule?*​

Answer»

Step-by-step explanation:

D = |3 2 |

|7 -4|

= (-12) -14

= -26

Dx= |-11 2 |

|9 -4|

= -44-18

= -62

Dy= |3 -11 |

|7 9|

= 27- (-77)

= 104

x=Dx/D= -62/-26= 31/13

y=Dy/D=104/-26= -4

x=31/13, y=-4



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