Taylor = T
Skylar = S
 
 Equation
 T = S + 13
 Proportion
 7T :: 4S
If Skylar worked 10 hours, Taylor worked 23 hours Proportion = 2.3
If skylar worked 5 hours, Taylor worked 18 hours Proportion = 3.6
Proportion
 7/4 = 1.75 the proportion must be 1.75
 ok
Equation

Taylor worked 30.333 hours
Skyler worked 17.333 hours