For simultaneous equations in variables x and y, Dx = 49, Dy = -63, D = 7 then what is x ?
Choose correct alternative.
For simultaneous equations in variables x and y, \(D_x\) = 49, \(D_y\) = -63, D = 7 then what is x ?
(A) 7 (B) −7 (C) \(\frac{1}{7}\) (D) \(\frac{-1}{7}\)