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October 2, 2014

October 2, 2014

Posted by **jade** on Friday, November 1, 2013 at 1:45am.

- math -
**Graham**, Friday, November 1, 2013 at 3:33amLet the folders cost f.

Let the rulers cost r.

Sarah paid: 8f + 3r

Lea paid: 8r + 3f

Sarah paid 1.25 more than Lea.

8f + 3r = 1.25 + 8r + 3f

5f = 1.25 + 5r

f = 0.25 + r

The rulers cost: r = 0.45

.: f = 0.70

Each folder costs 70 cents.

Check.

8*(0.70) + 3*(0.45) = 6.95

1.25 + 8*0.45) + 3 *(0.70) = 6.95

Okay!

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