Question

sadie finished her math test in sixteen minutes less than three times amount of time it took her friend Laura to finish. if their combined time was 1 hour and 8 minutes how long did it take sadie?​

Answer 1

X is time in minutes

X + 3X-16 = 68 <--- 1 hour 8 min = 68 min , because 1 hour = 60 min


4x - 16 = 68

4x = 84

x = 21

3(21) - 16 = 63 - 16 = 47

Sadie finished the test in 21 minutes
Friend finished the exam in 47 minutes.