Asked by Sanji

A girl buys x magazines at 50p each and x-3 magazines at 40p each. She spends £6 in all. Find x?

Answered by Steve
just add up the costs:

50x + 40(x-3) = 600
50x + 40x - 120 = 600
90x = 720
x = 8
Answered by Ms. Sue
0.5x + 0.4(x-3) = 6

0.5x + 0.4x - 1.2 = 6

0.9x = 7.2

x = 8

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