Kevin and Mary

Kevin is 4 times as old as Mary was 2 years ago. In seven years Mary will be as old as Kevin is now. How old are they now.

Correct answer:

K =  12

Step-by-step explanation:

K=4 (M2) M+7 = K  K=4 ((K7)2)  3K=36  K=336=12  K=12   Verifying Solution:  M=K7=127=5



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