Question

Ok this is very dificult for me to answer so....

Answer 1

`y=-1`

Explanation:

We get the equation
`2x-y=1`, and
`x=0`. Since we know the value of
`x`, that it is equal to 0, we can plug this into the equation for
`x`:

`2(0)-y=1`

From here, we can multiply 2 by 0 and then divide both sides by -1 to isolate
`y` and get what it's equal to.

`0-y=1`

`-y=1`

`y=-1`

Hope this helps!

Answer 2

y = -1

Explanation:

2x - y = 1

x = 0

y = ?

2(0) - y = 1

-y = 1

y = -1