Answered

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9) Two types of jeans were sold at a store Brand A sold for $40 per pair and Brand B sold for $30 perpair. The store sold 27 pairs of jeans for $930 total. How many MORE of Brand B did they sell thanBrand A?

Sagot :

Solution

For this case we can use the following equations:

A+ B= 27

40 A + 30 B = 930

If we solve A for the first equation we got:

A= 27 -B

And replacing in the second we got:

40 (27-B) + 30 B= 930

1080 -40B + 30B = 930

-10B= -150

B= 150/10 = 15

And slving for A we got:

A= 27-15= 12

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