Question

solve 11x+15y+23=0, 7x-2y-20=0 by cross multiplication method ???

Answer 1

Cheers please mark as brainliest

Answer 2

Answer:

Step-by-step explanation:

a1/a2 = 11/7

b1/b2 = 15/-2

c1/c2 = 23/-20

b1/b2 = c1/c2 = a1/a2 = b1/b2

X Y 1

15/-2 = 23/-20 = 11/7 = 15/-2

X/ 15(-20) - [-2(23)]

Y/ 23(7) - [-20(11)]

1/ 11(-2) - 15(7)

=

X/ -300 + 46

Y/ 161 + 220

1/ -22 + -105

=

X/ -254

Y/ 381

1/ -127

On comparing with 1/-127

X = -254/-127

∴ X = 2

Y = 381/-127

∴Y = (-3)