5x-y=-x+2y
-3x+5y=4x-3
solve using Cramer's rule
Answers
Answered by
1
Step-by-step explanation:
5x-y:-x+2y
5x+x-y-2y = 0
6x-3y = 0
dividing both sides by 3
2x-y=0............................1
-3x+5y=4x-3
-3x-4x+5y=-3
-7x+5y=-3
7x-5y=3............................2
compare equation with a1x+b1y=c1
compare equation with a2x+b2y=c2
a1=2 ;b1=-1 ;c1=0
a2=7 ;b2=-5 ;c2=3
D=2×(-5)-(-1)×7
=-10+7
= -3
Dx=0×(-5)-(-1)×3
=0+3
=3
Dy=2×3-7×0
=6-0
=6
by using Cramer's rule,
x=Dx/D
x=3/-3
x=-1
y=Dy/D
y=6/-3
y=-2
Similar questions