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posted by Anonymous .
susie went to the store. she spent half her money on groceries. she spent $13 on paper supplies. she still had 1/4 of the amount she began with. how much did she start with?

Let x = the money she started with
(3/4)x + 13 = x
13 = x  (3/4)x
13 = (1/4)x
13 / (1/4) = x
13 * (4/1) = x
52 = x
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