Question 1014066
A local Computer City sells batteries ($4) and small boxes of pens ($6). In August, total sales were $930. Customers bought 6 times as many batteries as boxes of pens. How many of each did Computer City sell? 
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Equations:
b = 6p
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4b + 6p = 930
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Substitute for "b" and solve for "p"::
4(6p) + 6p = 930
30p = 930
p = 31 (# of boxes of pens sold)
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b = 6p
b = 6*31 = 186 (# of batteries sold)
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Cheers,
Stan H.
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