Y=5x-10/2, 4x+5=-y (find the determinant in carmeras rule) pls help

1.	Y=5x-10/2, 4x+5=-y (find the determinant in carmeras rule) pls help
Answer» Answer: Sol. y = (5X – 10)/2 ∴ 2Y = 5x – 10 ∴ – 5x + 2y = – 10 Changing the sign, ∴ 5x – 2y = 10 Now, 4x + 5 = – y ∴ 4x + y = – 5 D = 5 -2 = (5 × 1) – (4 × -2) = 5 + 8 = 13 4 1 DX = 10 -2 = (10 × 1) – (-5 × -2) = 10 – 10 = 0 -5 1 DY = 5 10 = (5 × -5) – (4 × 10) = -25 - 40 = -65 4 -5 ∴ X = 0 and y = – 5 is the solution of given simultaneous equations.

Answer»

Answer:

Sol. y = (5X – 10)/2

∴ 2Y = 5x – 10

∴ – 5x + 2y = – 10

Changing the sign,

∴ 5x – 2y = 10

Now, 4x + 5 = – y

∴ 4x + y = – 5

-2

(5 × 1) – (4 × -2)

5 + 8

-2

(10 × 1) – (-5 × -2)

10 – 10

-5

(5 × -5) – (4 × 10)

-25 - 40

-65

-5

∴ X = 0 and y = – 5 is the solution of given simultaneous equations.

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Y=5x-10/2, 4x+5=-y (find the determinant in carmeras rule) pls help

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