SOLUTION: ned has 55 marbles in his collection. he has twice as many white marbles as red marbles. he has five more blue marbles than white marbles. how many white marbles does ned have

Question 888050: ned has 55 marbles in his collection. he has twice as many white marbles as red marbles. he has five more blue marbles than white marbles. how many white marbles does ned have
Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
W + R + B = 55 (I'm assuming there are no other colored marbles)
R = W [he has twice as many white marbles as red marbles]
B = W + 5 [he has five more blue marbles than white marbles.]
Substitute the known values of R and B into the top equation.
W + R + B = 55
W + (W) + (W+5) = 55
Add
2.5W + 5 = 55
Subtract 5 from each side
2.5W = 50
Divide each side by 2.5
W = 20
If there are 20 white marbles, then there are 25 blue marbles, and 10 red marbles.
20+25+10 = 55
RELATED QUESTIONS
Ned has 55 marbles in his collection. He has twice as many white marbles as red marbles.... (answered by josmiceli)

Jessie has 48 black marbles. He has 4 more than twice as many red marbles. How many... (answered by josgarithmetic)

A jar has twice as many red marbles as white marbles and the ratio of blue marbles to... (answered by Boreal)

There are 7 red marbles for every 3 blue marbles in a collection. the collection has 420... (answered by ewatrrr)

Carter has a large marble collection. Carter knows that he has exactly 20 blue marbles in (answered by richard1234)

A jar has twice as many red marbles as white marbles and the ratio of blue marbles to... (answered by scott8148,stanbon)

a bag contains 91 marbles. there are two more than twice as many blue marbles as green... (answered by josgarithmetic,MathTherapy)

A boy has five blue marbles, four green marbles and three red marbles. In how many ways (answered by Edwin McCravy)

In his pocket, a boy has 3 red marbles, 4 blue marbles, and 4 green marbles. How many... (answered by edjones)