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October 1, 2014

October 1, 2014

Posted by **Sanji** on Wednesday, November 21, 2012 at 11:19am.

- Maths -
**Steve**, Wednesday, November 21, 2012 at 11:25amjust add up the costs:

50x + 40(x-3) = 600

50x + 40x - 120 = 600

90x = 720

x = 8

- Maths -
**Ms. Sue**, Wednesday, November 21, 2012 at 11:28am0.5x + 0.4(x-3) = 6

0.5x + 0.4x - 1.2 = 6

0.9x = 7.2

x = 8

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