Answer :
for the 2nd equation u have to divide 3 for both sides so y can be alone so it will be y=3x+6


y = 2x + 6
3y = 6x + 18 or y = 2x + 6
so the graph of the two lines are the same
consequently, they system has
Infinite Solutions
This is the correct answer!!! Took the test and got it right :)