Question

x-2y=-1:,2x-y=7 solve the following simultaneous equations​

Answer 1

Answer:

x=5 and y=3

Step-by-step explanation:

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

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

first add both equations

gives us, 3x-3y=6

dividing both side by 3

x-y=2... (3)

Now subtract 1st equation from 2nd

gives us, x+y=8...(4)

adding equation (3) and (4)

gives us, 2x=10

x=10/2

x=5

place x=5 in equation (4)

5+y=8

y=8-5

y=3