Gary can hike on level ground 3 miles an hour faster than he can on uphill terrain. Yesterday, he
hiked 28 miles, spending 2 hours on level ground and 5 hours on uphill terrain. Find his average
speed on level ground.

Question

Gary can hike on level ground 3 miles an hour faster than he can on uphill terrain. Yesterday, he
hiked 28 miles, spending 2 hours on level ground and 5 hours on uphill terrain. Find his average
speed on level ground.

anonymous · Answer

Let $x$ be the speed on level ground and $y$ be the speed on uphill terrain.

Use the information to make a system of equations.  Then solve the system.