<PRE><B>Question 819432</B>
w + s = 10
s = 10 - w
12w + 16s = 14(10)
12w + 16s = 140
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12w + 16(10 - w) = 140
12w + 160 - 16w = 140
4w = 20
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w = 5 gal
s = 5 gal
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