Posted by susan on .
There are 18 bikes in a bike rack. There are 4 more blue bikes than yellow bikes and 2 less yellow bikes than green bikes. How many bikes of each color are in the rack?

3rd grade math (not algebra!) 
J.R.,
4 yellow bikes
8 blue bikes
6 green bikes
4+8+6=18 
3rd grade math (not algebra!) 
susan,
can you post how you solved it...I can
solve it using algebra.. but can't figure it out otherwise!!! 
3rd grade math (not algebra!) 
J.R.,
Ehh I just knew

3rd grade math (not algebra!) 
Bobby,
There is 10 blue bikes 6 green bikes and 2 yellow bikes

3rd grade math (not algebra!) 
Selma,
from the information above:
I blue = yellow + 4
II yellow = green  2
OR yellow +2 = green
and we know that
III yellow + blue + green = 18
now insert upper expressions into the III equation:
yellow + (yellow +4) + (yellow +2) = 18
3 yellow + 6 = 18
> yellow = 4
insert 4 into upper equation and you will get
blue= 4+4
green= 4+2 
3rd grade math (not algebra!) 
Iris,
18 bikes in all. 4 more blue than yellow, 2 less yellow than green, how many green bikes are there?