Question

Simultaneous equations

2x + 4y = 1
3x - 5y = 7

Answer 1

Step-by-step explanation:

2x + 4y = 1....(1)

3x - 5y = 7....(2)

multiply equation 1 by 3

6x + 12y = 3..(3)

multiply equation 2 by 2

6x - 10y = 14..(4)

Subtracting 3 from 4

-22y= 11

y = - 1/2

2x + 4y = 1

2x + 4(1/2) = 1

2x + 2 =1

2x = 1 - 2

2x = -1

x = -1/2

x = -1/2

y = - 1/2.

Answer 2

Answer:

y = -0.5

x = 1.5

Step-by-step explanation:

6x + 12y =3

6x -10y = 14

- take them away to cancel x

22y = -11

y = -0.5

x = 1.5