Package A weighs half as much as Package B. Package B weighs four times as much as Package C. The total weight of Package A and Package C is 648 grams. Find the weight of Package B.

Answer 1

a = b/2
b = 4c
a+c = 648

so,

b/2 + b/4 = 648
3/4 b = 648
b = 648 * 4/3 = 864