31. The total cost of a blouse and skirt is P650. The cost of the blouse is two-thirds the cost of the skirt. How much does the skirt cost? How much is the blouse?
#A=1/2B=1/2 (3C) = 3/2C#. Substituting #A=3/2C# and #B=3C# into the third equation we find: #44 = A+B+C = (3/2C) + 3C + C = 11/2C#. Multiplying both ends by #2/11# we find.
