Let Witch, Star and Broom be W, S & B respectively.
W+S+B+W+S+B+W+S+B = 45
3W + 3S + 3B = 45
3 ( W + S + B ) = 45
W + S + B = 45/3
W + S + B = 15. ------(1)
S + S + S = 21
3S = 21
S. = 21/3
S = 7. -------- (2)
B + 2B + B = 12
4B. = 12
B = 12/4
B = 3 -------(3)
FROM (1)
W + 7 + 3 = 15
W + 10 = 15
W = 15 - 10
W = 5
ANSWER
= B + 5 X 2(S)
= B + 5 X 2(7)
= 3 + 5 X 14
= 3 + 70
= 73
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