How many solutions does the system of equations have y 5x

How many solutions does the system of equations have? y = 5x + 7 and 3y - 15x = 18

y -5x +7 & 3y-15x = 18

this will have no solution because

A1/A2 = B1/B2 NOT EQUAL TO C1/C2

HERE A1 AND A2 ARE 1,3

B1 AND B2 ARE -5 AND -15

C1 AND C2 ARE 7,18

HENCE THE RATIO OF TWO ARE EQUAL AND NOT EQUAL TO THE THIRD HENCE

NO SOLUTION

HENCE ANSWER WILL BE OPTION D