SOLUTION: Ned has 55 marbles in his collection. He has twice as many white marbles as red marbles. He has 5 more blue marbles than white marbles. How many white marbles does Ned have?
Algebra ->
Human-and-algebraic-language
-> SOLUTION: Ned has 55 marbles in his collection. He has twice as many white marbles as red marbles. He has 5 more blue marbles than white marbles. How many white marbles does Ned have?
Log On
Question 884513: Ned has 55 marbles in his collection. He has twice as many white marbles as red marbles. He has 5 more blue marbles than white marbles. How many white marbles does Ned have? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = number of white marbles
Let = number of red marbles
Let = number of blue marbles
--------------------------------
(1)
(2)
(3)
-----------------
(2)
Substitute (2) and (3) into (1)
(1)
(1)
(1)
(1)
and
(3)
(3)
(3)
and
(2)
(2)
(2)
Ned has 20 white marbles
check:
(3)
(3)
(3)
OK
