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Nana76 [90]
3 years ago
9

Mary, who is sixteen years old, is four times as old as her brother. How old will Mary be when she is twice as old as her brothe

r?
Mathematics
2 answers:
Makovka662 [10]3 years ago
6 0
M = 16
16 = 4B
B = 4
(M - B) = 12  <== this will never change.  Mary will always be 12 yrs older than he is.

So, when she is twice as old as he is, he is 12 and <u>she is 24</u>.
That will occur in 8 years from now.
They should live long and prosper.
DENIUS [597]3 years ago
4 0

Answer:

32

Step-by-step explanation:

16 times 4 is 64

64 divided by 2 is equal to 32

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