Homework Help: algebra

Posted by Denise on Thursday, June 24, 2010 at 7:55am.

The St. Mark's Community Barbecue served 250 dinners. A child's plate cost $3.50 and an adult's plate cost $7.00. A total of $1347.50 was collected. How many of each type of plate was served

algebra - Reiny, Thursday, June 24, 2010 at 8:14am
child's plate --- x
adult ----- 250-x

solve

3.5x + 7(250-x) = 1347.5

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