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The fifth grade equation

Rainbow conventions2010-01-25 11:02:03 +0000 #1
Buy three ballpoint pens and a pen to the public 18 yuan, pen ball-point pen unit price is 4.5 times, and asked how much yuan each pen ball-point pen?
370,1162010-01-25 11:05:37 +0000 #2
based ball-point pen is x, then the pen is a 4.5x

3x +4.5 x = 18

x = 2.4

A: The ball-point pen is 2.4 yuan / sticks, pens, 4.5 * 2.4 = 10.8 Yuan / Support
yunyun5211252010-01-25 11:13:18 +0000 #3
1: X-based ball-point pen is priced at RMB

3X +4.5 X = 18

2: Let pen is priced at X Yuan, Y pen is priced at RMB

3X + Y = 18

Y = 4.5X

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