Question

3x+4y=-14
-2x-3y=11
find the equation using Cramer's rule
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Answer 1

Step-by-step explanation:

a1=3 b1=4 c1= -14

a2= -2 b2= -3 c2 =11

D=[a1b2-a2b1]

=[3×(-3)-(-2)×4]

=[-9+8]

= -1

Dx=[c1b2-c2b1]

=[-14×(-3)-11×4]

=[42-44]

= -2

Dy=[a1c2-a2c1]

=[ 3×11-(-2)×(-14)]

=[33-28]

=5

X=Dx/D= -2/-1=2

Y=Dy/D= 5/-1 = -5