Answer:
u=3
Step-by-step explanation:
Add 5 to both sides of the equation. That cancels out 5 on the right and gives you 9 on the left. Now divide 3 from both sides and you get 3.
i think that it is 2
it has one solution
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
