Sonya worked 10 hours more than Devin last month. If Sonya worked 8 hours for every 2 hours Devin worked, how many hours did they each work?

Answer 1

S = D +10

S/D = 8/2 = 4

S=4D

4D = D+10

3D = 10

D = 10/3 = 3 1/3 hours

S = 10 + 10/3 = 13 1/3 hours