Which equation has integer solutions for xxx and yyy?
3x+6y=53x + 6y = 53x+6y=5
4x+6y=84x + 6y = 84x+6y=8
9x+12y=79x + 12y = 79x+12y=7
15x+10y=915x + 10y = 915x+10y=9