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September 19, 2014

September 19, 2014

Posted by **Anonymous** on Tuesday, February 25, 2014 at 8:36am.

- algebra 1 -
**Reiny**, Tuesday, February 25, 2014 at 9:56amlet the number of 4-people cars be x

then the number of 6-person cars is 15-x

4x + 6(15-x) = 72

4x + 90 - 6x = 72

-2x = -18

x = 9

9 of the 4-person cars and 6 of the 6-person cars

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