Question

substute method 2x-y=9,x-2y=7​

Answer 1

Answer:

2x-y=9 ......(1)

x-2y=7

x=7+2y.....(2)

substitution ....equation 2 in equation 1

2x-y=9

2(7+2y)-y=9

14+4y-y=9

14+3y=9

3y=9-14

y=-5/3