Question

1]
x + 2y = 1, 2x - 3y = 12,
Find Dx, Dy​

Answer 1

Answer:

x=1-2y

2(1-2y) - 3y = 12

2 - 4y -3y = 12

-7y=-14

y=2

x+2y=1

x+2(2)=1

x= -3

Answer 2

Step-by-step explanation:

The given equations are

x + 2y = – 1 ..(i)

and 2x – 3y = 12 …(ii)

From (i) x = – 1 – 2y …(iii)

Substituting this value of x in

(ii), we get

2( – 1 – 2y) – 3y = 2

⇒ – 2 – 4y – 3y = 12

⇒ – 7y = 14

⇒ y = -2

Putting y = – 2 in (iii), we get

x = -1-2×(-2) = -1+4 = 3

Hence the required solution is x = 3 and y

= – 2.