Question

If Dx=-21, Dy=21, D=3 in certain simultaneous equation in x and y. Find x ​

Answer 1

x= -7, y= 7

Step-by-step explanation:

Here we are given Dx=-21, Dy=21, D=3

so place the the value of D in all equation

so it will become.

Dx = -21

3x = -21

x = -21/3

x= -7

now again,

Dy = 21

3y = 21

y = 21/3

y = 7

so finally the answer is: x= -7, y= 7

HOPE IT WIL BE HELPFUL !!