A 2-liter bottle of Coke for $1.39 is the best deal. No need to divide.
Answer:
the second option and x=20
$750 / $30 = 25 maths teaching kids
$350 / $25 = 14 maths starter kits
if you wanted to see if it was right, you would just do 14*25 and you would get $350
hope I helped!!