Posted by **were here** on Saturday, March 17, 2012 at 11:40pm.

if a boy is 4 years less than twice his sisters age and the sum of the age is 11 how old is he

- math -
**john**, Sunday, March 18, 2012 at 12:32am
go through each of the possibilities of getting to 11. 1+10 2+9 3+8 4+7 and so on. think of what you are looking for, twice the girls age will be four more than the boys age.

- math -
**Steve**, Sunday, March 18, 2012 at 3:15pm
or, using algebra

b+s=11

b=2s-4

2s-4+s=11

3s=15

s=5

so, b=6

check:

6=2*5-4

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