SOLUTION: Bob and Jill went on a bike trip. They took a bus to their starting point and then biked the rest. They traveled 300 kilometers, and they biked 70 kilometers more than they were b

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Bob and Jill went on a bike trip. They took a bus to their starting point and then biked the rest. They traveled 300 kilometers, and they biked 70 kilometers more than they were b      Log On


   

Question 549469: Bob and Jill went on a bike trip. They took a bus to their starting point and then biked the rest. They traveled 300 kilometers, and they biked 70 kilometers more than they were bussed. Let x=kilometers traveled by bike and y=kilometers traveled by bus. How many kilometers traveled by bike?
Answer by TutorDelphia(193) About Me  (Show Source):
You can put this solution on YOUR website!
They traveled a total of 300km
b+y=300
They biked 70 more km than they bused
b=y+70
Sub in y+70 for b
y+70+y=300
combine like terms
2y+70=300
subtract 70 from both sides
2y=230
divide both sides by 2
y=115
sub in 115 for b
b=115+70
b=185