Michael is x years old.his sister sarah is 3 years younger than micheal.His brother eli is twice the age of sarah if X=12,find the diffrence between sarah and elis age 



Explain your answer,providing calculation or any other stratagey that will support your reasoning.

Guest Mar 8, 2017

Michael age = x

Sarah age =  x-3

Eli age = 2 (x-3)


difference between eli and sarah   =    2(x-3)- (x-3) = 2x-6-x+3= x-3      when x= 12   x-3 = 9 yrs difference

ElectricPavlov  Mar 8, 2017

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