Respuesta :

The answer is 28, 21-7 is 14, 14x2 is 28.
plylor
She had 28 paintings to begin with. Because if you take away the 7 that she bought, you would have 14 which we know is half of what she had to begin with. Which means all you have to do is double 14 which means she has 28 paintings.
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