SOLUTION: Zach is 15 years old. This is 3 years younger than Ben. How old is Ben

Question 820448: Zach is 15 years old. This is 3 years younger than Ben. How old is Ben

Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
z = b - 3
15 = b - 3
b = 18
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