Question

solve by using cross multiplication 2/x +3/y= 13, 5/x - 4/y =-2

Answer 1

Step-by-step explanation:

5u-4v=-2

plz everyone follow me

Answer 2

Answer:

2/x + 3/y -13 = 0

5/x - 4/y - 2 = 0

first we will check whether the system of equation has a solution

for this the value of determinant

D =. | 2. 3 |

| 5. -4 |

must not be equal to zero

2*(-4) - 3*5 = -8 -15 = -23 hence we have a solution

D = -23

the solution by cross multiplication is

|. 3. -13. |

1/x =. |.-4. -2. |

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D

1/x = (3*-2 - -13*-4)/-23

= (-6 -52)/-23

= -58/-23

= 58/23

x = 23/58

| -13. 2. |

1/y =. |. -2. 5. |

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D

1/y = (-13*5 - 2*-2)/-23

= (-65 + 4)/-23

= -61/-23

= 61/23

y = 23/61