Question

There are red and blue marbles in a jar. One-third of the marbles are red. If another red marble is added to the jar, then 3/8 of the marbles will be red. How many marbles are blue?

Answer 1

I guess 5/8 wasn't the correct answer

Answer 2

nope

Answer 3

It needs to be a whole #

Answer 4

Oh, I see

Answer 5

x = Total number of marbles. y = Number of red initially. z = Number of blue initially.

\[x/3 = y\] \[3x/8 = y + 1\] (Substitute)\[9y/8 = y + 1\]\[y = 8\]\[x = 24\]\[x = y + z\] \[z = 16\]

Answer 6

I think thats right

Answer 7

It's right lol :D

Answer 8

thank u so much :D