Marla bought 7 boxes. a week later, half of all her boxes were destroyed in a fire. there are now only 22 boxes left. how many did she start with?

Let b represent the starting number of boxes. Then, after her purchase of 7 more boxes, Marla had x+7 boxes, which constitute half of the starting number:

(1/2)(x+7) = 22, or x+7 = 44. Thus, x = 37.

Marla started with 37 boxes.

She purchased 7 more, bringing her count to 44 boxes.

She lost half of these 44 boxes, or 22 boxes, in the fire.

Marla started with 37 boxes.

should have been evaluated with one odd value and one even value. the expressions have equivalent values when . when , the first expression has a value of 3 and the second

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