Asked by cessy
Cindy is four years older than twice Mark's age. Juan is half as old as Cindy. How much years older than Juan is Mark?
Answers
Answered by
Reiny
Mark --- x
Cindy --- 2x+4
Juan --- (1/2)(2x+4 = x+2
comparing x with (x+2) .....
so Juan is 2 years older than Mark
this will be true for any age of Mark you pick:
e.g. let Juan's age be 10
then Cindy is 24
and Mark will be 12, which is 2 years more than Juan
Cindy --- 2x+4
Juan --- (1/2)(2x+4 = x+2
comparing x with (x+2) .....
so Juan is 2 years older than Mark
this will be true for any age of Mark you pick:
e.g. let Juan's age be 10
then Cindy is 24
and Mark will be 12, which is 2 years more than Juan
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