A cheetahs sprinting speed is 61 mph less than 3 times a zebras running speed. a cheetah can sprint 68 miles?

per hour what is the zebras running speed?...... please help me im not just looking for the answer im wanting to know how to get to it too. im stuck on a few problems and i know theyre simple but i have tried and my answer comes out totally wrong and i dont know what im doing wrong.