Question

Hey does anyone know? I don't Number 1,2, And 3 I forgot to attach a picture So I'm sending it again

1. y=x
y=2x-4

2. y=-1/2x + 5
y=3x-2

3. y-2x=4
y=2x​

Answer 1

1. y=4 x=4

2. x=2 y=4

3. i dont know

Explanation: