Question

2. 5x + 4y = 4, x - 12y = 20
In elimination method ​

Answer 1

5x +4y=4 -----> (1)

x-12y = 20 ------> (2)

multiply equation 1 by 3

15x + 12y =12 -----(3)

add equation 3 and 2

15x+12y=12 + x-12y = 20

16x=32

x=32/16

x=2

put x=2 in equation 2

2-12y=20

12y=20-2

12y= 18

y = 18/12

y= 3/2

solution is x=2; y 3/2