Question

URGENT can someone solve using cramers rule? 15 PTS ​

Answer 1

Answer:

$x = 1$

$y = 4$

Step-by-step explanation:

$2x + y = - 2 \\ 2x + 4y = 10$

from eq. 2, we get

$2x + 4y = 10 \\ 2x = 10 - 4y \\ x = \frac{10 - 4y}{2}$

put x in eq. 1

$2x + y = - 2 \\ 2( \frac{10 - 4y}{2} )+ y = - 2 \\ 10 - 4y + y = - 2 \\ - 3y = - 12 \\ y = \frac{ - 12}{ - 3} \\ y = 4$

put y =4 in eq. 1

$2x + y = - 2 \\ 2x - 4 = - 2 \\ 2x = 4 - 2 \\ 2x = 2 \\ x = \frac{2}{2} \\ x = 1$