Question

HELP PLZ PICTURE^ Need it asap porfa

Answer 1

it has one solution

Explanation:

1.y=x-3

2. 3y-3x sub x-3 in place of y therefore

it can also be written as 3x-3x-9=9

if you add 9 to both sides 3x-3x-9+9=-9+9

0+0=0