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18-10-2016
Mathematics

contestada

the cost of a pen is three times the cost of a pencil. the cost of 4 pencils and 3 pens is $9.75. what is the cost of a pencil? the cost of a pen is three times the cost of a pencil. the cost of 4 pencils and 3 pens is $9.75. what is the cost of a pencil?

Respuesta :

20-10-2016

9.75=4x+3(3x)
9.75=4x+9x
9.75=13x
x=.75
One pencil costs $0.75

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