Homework Help: Maths

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

A girl buys x magazines at 50p each and x-3 magazines at 40p each. She spends Ł6 in all. Find x?

Maths - Steve, Wednesday, November 21, 2012 at 11:25am
just 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 11:28am
0.5x + 0.4(x-3) = 6

0.5x + 0.4x - 1.2 = 6

0.9x = 7.2

x = 8

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