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?
Answers
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
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
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