Question

Find D for the simultaneous equations x - 2y = -18; 2x - y = 9.

y

pls ans fast pls​

Answer 1

Answer:

x = 0, y = 9

Step-by-step explanation

x-2y = -18

2x - y = 9

2x-4y = -36   (I made both x's to have the same coefficient

2x - y = 9

-4y-y = -36-9

-5y = -45

y = 9

x - 2(9) = -18

x - 18 = -18

x= 0

Hope u understand. Pls, mark me as brainiest. Thanks!

Answer 2

Step-by-step explanation:

Our equation is

x-2y=-18—(1)

2x-y=9—(2)

To find x from eq 1 we get,

x=18+2y

substitute in eq 2

2x-y=9

36+4y-y=9

3y=-27

y=-9

putting value of y in x

x=18+2y

=18-18=0

hence,our equation is

0+18=-18 ( not possible)

and other

0-18=9

27=D