Respuesta :

11. 
line A is y=3/2x-4
line B is -3/2x+3
x=7/3

12. 
line A is y=3/2x-5/2
line B is y=-5x+15
x=35/13

13. 
line A is -1/2x+3/2
line B is 1/2x-1
x=5/2