I believe you have the equations wrong. 1 equation you can use is t=15d, and the other equation you can use is d=t/15. then if you plug 7.5 for d in one of the equations you can get the answer
Yes so well done for establishing T= 30 And d=2 Now we need an equation that links together. So to get d (2) equal to t (which is 30) we need to multiply by 15. So t = 15d Or if you make d the subject D = 15/t
So if this Titus walks 7.5 miles T = 15 x distance Time = 15 x 7.5 So the time is 112.5 Hope it helps
