Total distance covered by George and Carmen
x + y = 350
And they biked 80 kilometers more than they bussed
80 + y = x
Putting the value of x=80 + y in x + y = 350:
We get:
80 + y + y = 350
2y = 270
y = 135 km
Substituting y = 135 in x + y = 350
x + 135 = 350
x = 215 km
Thus George and Carmen biked for 215 km and bussed for 135 km.