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January 30, 2015

January 30, 2015

Posted by **Andrea** on Thursday, July 24, 2008 at 7:15pm.

I have to get 2 equations from this and use the substitution or elimination method

- Pre-Calculus -
**drwls**, Thursday, July 24, 2008 at 7:22pmThe first equation would be

3000 C + 5000 T = 137,000,000 (total sales)

The second equation would be

3000*.20*C + 5000*.30*T = 27,000,000 (profit)

This can be rewritten

600 C + 1500 T = 27,000,000

Now solve those two equations for C and T, the number of cars and trucks sold, using either method.

- Pre-Calculus -
**drwls**, Thursday, July 24, 2008 at 10:03pmI get the same result as you, and checked my work. I have no explanation

- Pre-Calculus -
**Brandon**, Saturday, July 26, 2008 at 8:05pmSometimes one winds up with an "erroneous" solution.

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