Mary spent 3/4of her money On a dictionary.she spent 1/2 of the remainder on the calculator the dictionary cost 30 $ more than calculator how much did the dictionary cost
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Let have Mary has $X.
Dictionary : 3/4*x = $3x/4.
Balance amount = X-3x/4 = x/4 Dollars.
Calculator : 1/2 * x/4 = x/8.
Balance amount = x/4-x/8 = x/8.
x/8 + (x/8+30) + x/8 = X.
3x/8 - X = -30,
5x/8 = 30,
X = 48.
Dictionary cost = 3x/4 = 3*48/4 = 36
Calculator cost x/8 = 48/8 = 6
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