5. Which system of equations would have the same solution as the system:
x+y=5
3x + 2y = 10
(1) 3x + 2y = 5
x+y= 10
(2)-3x - 3y=-15
3x + 2y = 10
(3)-3x - 3y=5
3x + 2y = 10
(4) 2x + 2y = 5
3x + 2y = 10

In a fifth grade class, 3/5 of the girls have brown hair. of the brown-haired girls, 3/4 of them have long hair. of the girls with long brown hair, 1/3 of them have green eyes. what fraction of the girls in the class have long brown hair?