Homework Help: algebra

Posted by maxy on Thursday, December 13, 2012 at 6:36pm.

there was a total of 840 guests at a wedding dinner. 60% of them were adults, and the rest were children. some boys left before the dessert was served. as a result, the percentage of adults increased to 70%. how many boys left before the dessert was served

algebra - Damon, Thursday, December 13, 2012 at 7:12pm
original:
840 total
504 adults
336 children

final
840 - b total
504 adults
336 - b children

so
504 adults = .7(840 -b)
all set?
algebra - Anonymous, Tuesday, February 12, 2013 at 5:23pm
b=132

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