Gingerbread house

Jane and Mary calculated that there were 210 gingerbreads on the gingerbread house. Johnny ate one-seventh of all gingerbreads, and Mary ate a third less than Johnny. How many gingerbreads remained in the gingerbread house?

Final Answer:

n =  160

Step-by-step explanation:

J=210/7=30 M=(11/3) J=(11/3) 30=20  n=210JM=2103020=160



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