SOLUTION: When three numbers are added two at a time, the sums are 33, 48, and 53. The sum
of all three numbers is:
(A) 134 (B) 86 (C) 81 (D) 67 (E) 53
Question 281893: When three numbers are added two at a time, the sums are 33, 48, and 53. The sum
of all three numbers is:
(A) 134 (B) 86 (C) 81 (D) 67 (E) 53 Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! (1)
(2)
(3)
This is 3 equations and 3 unknowns,
so it's solvable
Subtract (3) from (2)
(2)
(3)
Add this result to (1)
and,
and,
(3)
The answer is (D)
