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October 30, 2014

October 30, 2014

Posted by **Gav** on Friday, September 23, 2011 at 11:27am.

- math -
**Henry**, Saturday, September 24, 2011 at 8:56pm$X = Cost of B.

$X = Cost of C.

X -!.90 = Cost of A.

X - 4.20 = Cost of each staple.

X + X + (X-1.90) = 4(X-4.20) + 5.60,

3x - 1.90 = 4x-16.80 + 5.60,

3x - 4x = -16.80 + 5.60 + 1.90 = -9.30,

-x = -9.30,

X = $9.30. = Cost of B.

X = $9.30 = Cost of C.

X-1.90 = 9.30 - 1.90 = $7.40=Cost of A.

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