Respuesta :
The equation is (assuming you meant the instead of two): T = 15c
Answer: If each member of the club collected 15 boxes, and you have C members in your club, then the total amount of boxes collected is 15*C boxes.
if you wanted to write "the" instead of "two"; then T = 15*C.
if you wanted to write "twice" instead of "two"; then T = 2*15*C = 30*C.