Question

For simultaneous equations in variables x and y, Dx = 49, Dy = -63 D = 7 then x = _______

Answer 1

Step-by-step explanation:

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

=7×X=49. 7×y=-63

= 49-7=x. -63-7=y.

Hence. 49-7=42. -63-7=-70

X=42. y= -70