SOLUTION: andrea and alexis are twins. they have a brother who is eleven years older than they are and a brother who is four years younger. the sum of the ages of all four children is 35. wr

Question 767636: andrea and alexis are twins. they have a brother who is eleven years older than they are and a brother who is four years younger. the sum of the ages of all four children is 35. write an equation to finds sisters age.
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Andrea and Alexis age = x
Older brother = 11 + x
Younger brother = x - 4)
Total: x + x + (11 + x) + (x - 4) = 35
x + x + 11 + x + x - 4 = 35
4x + 7 = 35
4x = 28
x = 7
Sisters' ages = 7 years each
Younger brother = 3 years
Older brother = 18 years
Hope this helps.
:-)
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