Asked by gabriel

Sandra is eight yrs younger than her brother mike. six yrs ago mike was three times old of Sandra. how old is mike? how old is Sandra?
Answered by gabriel
34+7
Answered by Scott
s = m - 8

m - 6 = 3(s - 6) = 3 s - 18

m - 8 = 3 s - 20

susbstituting
... s = 3 s - 20
... 20 = 2 s
Answered by Reiny
mike's age ---- x years
Sandra's age --- x-8 years

Six years ago:
Mike was x - 6
Sandra was x-8-6 = x-14
x-6 = 3(x-14)
x-6 = 3x - 42
36 = 2x
x = 18

Mike is now 18 and Sandra is now 10 years old

check:
6 years ago Mike was 12 and Sandra was 4
which is 3 times as old
My answer is correct
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