Question

madad kar do please​

Answer 1

Answer:

x = 2 & y = 1

Step-by-step explanation:

= > x + 2y - 4 = 0

= > x = 4 - 2y ... (1)

In second:

= > 2x + 5y - 9 = 0

= > 2(4 - 2y) + 5y - 9 = 0 { from(1)}

= > 8 - 4y + 5y - 9 = 0

= > 5y - 4y - 9 + 8 = 0

= > y - 1 = 0

= > y = 1

Therefore,

= > x = 4 - 2y = 4 - 2(1)

= > x = 4 - 2 = 2

It is done with matrix method, in added image.

$If\:\:\small{ \binom{1 \: \: \: \: \: \: \: \:2 }{2 \: \: \: \: \: \: \: \: 5} = A} \\\\</p><p> \: So\: \: A {}^{ - 1} = \small{\frac{1}{(5 \times 1) - (4 \times 4)} \binom{5 \: \: \: \: \: \: - 2}{ - 2 \: \: \: \: \: \: \: 1} =\binom{5 \: \: \: \: \: \: - 2}{ - 2 \: \: \: \: \: \: \: 1}}$

Thats why it is multiplied in the third line.