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Bunuel
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First house sold at 25% loss, 0.75x= 225,000
X= 300,000
Second house bought at a price 30% less than original price paid for first house, so
300,000-(300,000*0.30)= 210,000
Net gain= 225,000-210,000= 15,000/-

Answer: A
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For those who prefer working with fractions:

Let x be the original price of the home.

x - 25%(1) = 75%(3)x
-----------4-----------4

We have the price the home sold for. So:

3x = 225000
4x

3x = 225000 * 4
---------1--------3

= 300,000

Now find the price the new home was purchased for:

300000 * 7 = 210,000
----1------10

Lastly we are asked to find the net gain:

225000 - 210000
= 15000

A
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Easier than it looks:

Set up as 225, then form the equation:

225 = 3/4X
solve and get X = 300

Then simply take off 30% from 300
(Hint: percentages of multiples of 10 are easy, go back one place. i.e. 10% of 225 is 22.5)

So you should get 30 * 3 for 30%, subtract from 300 - 90 = 210

225 - 210 = 15

Put back into proper thousands place, 15 to 15,000

Answer $15,000:)
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