business math
posted by shannon .
chicken delight sells wholechicken dinners for $12 and halfchicken dinners for $8. yesterday they sold a total of 400 dinners and took in $4200. how many of each size dinners were sold?

Use algebra to solve this. Let x be the number of wholechicken dinners sold, and y be the number of halfchicken dinners.
x + y = 400 (the number sold)
12x + 6y = 4200 (gross receipts)
12x + 12y = 4800
6y = 600
Two more steps and you will have the answer. You finish the problem. 
whole 250.half 150