Question

0.3 BY EQUATING COEFFICIENT OF VARIABLES, SOLVE THE FOLLOWING
(i) x-2y=-10;3x-5y=-12



​

Answer 1

Answer:

x=-94. y=42

Step-by-step explanation:

x-2y=-10. 3x-5y=-12

multiplying eqn1 by 3 and subtracting

3x-6y-3x+5y=-30+12

-y=42

y=42

putting in eqn1

x-2(-42)=-10

x+84=-10

x=-94.

Answer 2

x-2y =-10.......,...1

x-2y=10

3x-5y=-12..........2

multiplying equation 1 by 3

3x-6y=30

subtracting equation(2)and (3)

3x-5y=-12

3x-6y=-30

y=18

substitute y=18in equation 1

x=2(18)=-10

x-36=-10

x=-10+36

x=26