Question

8. Solve the following system of equations using the cross-multiplication
method.
6x – 3y = (-2); 2x - 5y = -30.​

Answer 1

Answer:

x=10

3

y=22

3

Step-by-step explanation:

6x-3y=-2

6x-3y+2=0

a1=6

b1=-3

c1=2

2x-5y=-30

2x-5y+30=0

a2=2

b2= (-5)

c2=30

x= b1c2-b2c1

a1b2-a2b1

=-90-(-10) = -90+10 = -80= 40= 20= 10

-30-(-6) -30+6 -24 12 6 3

y= c1a2-c2a1

a1b2-a2b1

= 4-(180) = -176 = 88 = 44 = 22

-30+6 -24 12 6 3