Posted by **lidia** on Saturday, September 1, 2012 at 10:51am.

4 kg of apples and 1 kg of berries cost $5.75 altogether. 2 kg of apples and 1 kg of berries cost a total of $3.25.How much must i pay to buy 5 kg of apples and 5 kg of berries?please show work.

my answer is $10.50 am i right if not please tell me why and how?

- aig math(please answer) -
**David Q/R**, Saturday, September 1, 2012 at 5:24pm
Not quite, I think. Call the number of kilos of apples A, and the number of kilos of berries B. Then you know that:

4A + B = $5.75

2A + B = $3.25

so subtract the second equation from the first, and you'll get

2A = $2.50, so A = $1.25. Subtract the 2A = $2.50 from the second equation and you'll get

B = $0.75, so A + B = $2, which means that 5A + 5B = $10.

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