Question 472776
Bob Brown bought two plots of land for a total of $110,000. 
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On the first plot, he made a profit of 16%. On the second, he lost 4%. His total profit was $9600. 
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How much did he pay for each piece of land?
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Using 2 variables you would get:
x + y = 110,000
0.16x - 0.04y = 9600
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Multiply thru 2nd by 100 to get:
x + y = 110,000
16x-4y = 960000
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Multiply thru 1st equation by 4 to get:
4x + 4y = 4*110,000
16x+ 4y = 960000
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Subtract and solve for "x":
12x = 520000
x = $43,333.33 (Price paid for 1st parcel of land)
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solve for "y":
x + y = 110000
43,333.33 + y = 110000
y = $66,666.67 (Price paid for 2nd parcel of land)
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Cheers,
Stan H.
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