Question

4x +3y = 4 6x + 5y = 8 = 4X5 = 20-18 = 2 =4X5-3X8 = 20-24= = 4X8-4X6 = 32 24 8 Dx A X = D and_y = Dy Dx=​

Answer 1

Answer:

Given, 4x + 3y - 4 = 0 -------(1)

6x = 8 - 5y

6x + 5y - 8 = 0 -------(2)

use Cramer's rule ,

4x + 3y - 4 = 0

6x + 5y - 8 = 0

for equations ,

\frac{x}{3\times-8-(-4)\times5}=\frac{-y}{4\times - 8-(-4)\times6}=\frac{1}{4\times5-3\times6}3×−8−(−4)×5x=4×−8−(−4)×6−y=4×5−3×61

=> x/(-24 + 20) = -y/(-32+ 24) = 1/(20 - 18)

=> x/-4 = -y/-8= 1/2

=> x/-4 = y/8 = 1/2

=> x = -4/2 = -2 and y = 8/2 = 4

hence, x = -2 and y = 4