Question

For simultaneous equations in variables x and y, if D. = 49, D, = -63, D = 7, then what is the value of
x?
(A)
(B)
-7
7
1
7
(C)
(D)
7​

Answer 1

Answer:

The value of x is 7

Step-by-step explanation:

Dx = 49, Dy = -63, D = 7 .... Given

Using Cramer's rule,

x = (Dx)/D .... Formula

x = 49/7

x = 7