A week later half of all the boxes were destroyed in a fire. There are now only 22 boxes left. How many did she start with? ---------------- Assume she had x boxes to start with. After buying 7 she had x+7 boxes She lost (1/2)(x+7) in the fire. --- Equation: x - (1/2)(x+7) = 22

x - (1/2)x - (7/2) = 22 (1/2)x - (7/2) = 22 (1/2)x = 51/2 x = 51 boxes

Jun 1st, 2015

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