SOLUTION: Brian is 3 times older than Sydney, the sum of their ages is 8. How old is Brian?

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Question 1102065: Brian is 3 times older than Sydney, the sum of their ages is 8. How old is Brian?
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52835)   (Show Source): You can put this solution on YOUR website!
.
Brian is 3 times as old as Sydney, the sum of their ages is 8. How old is Brian?
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Answer.   Brian is  6  years.   2 + 6 = 8     (mental solution,  2  seconds).

Algebra Solution.

Sydney + Brian = 8

S      + B     = 8

S      + 3S    = 8


4S = 8  ====>  S =  = 2;  then  B = 3*2 = 6.

Solved.


Answer by josgarithmetic(39623)   (Show Source): You can put this solution on YOUR website!
b Brian
x Sidney
"Brian is THREE TIMES OLDER THAN Sidney,..."








NOT a whole number

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