Homework Help: Math

Posted by Kelly on Monday, October 19, 2009 at 12:56pm.

Mr. Smith has 17 18-cent notebooks and 7-cent pencils. The notebooks and pencils are worth $1.85. How many notebooks and how many pencils does Mr. Smith have?

I would like to see how this is solved, not just the answer, that way I can learn how to do it.

Math - bobpursley, Monday, October 19, 2009 at 1:02pm
17=N+P
.18N+.07P=1.85

in the first equation solve for N
N=17-P
Put that into the second equation.
.18(17-P)+.07P=1.85
then solve for P. Once you have that,
N=17-P
Math - Kelly, Monday, October 19, 2009 at 1:04pm
Thank you so much for explaining.

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