Question

for simultaneous equation in variables x and y ,if Dx = 49 , Dy = - 63 ,D = 7 ,then what is the value of x?
(a) 7
(b) -7
(c) 1/7
(d) -1/7​

Answer 1

Answer:

7 is the answer.

Already given that D=7.

So 7x=49

x=49/7

therefore x=7