Respuesta :

26:y=1.5-4=2.5 when x=2
y=-4 when x=0
y=-25/4 when x=-3
27: y=39/5 when x=2
y=7 when x=0 y=29/5 when x=-3
28: y=32/7 when x=2
y=4 when x=0
y=22/7 when x=-3