Need help with this problem:(

[roadrunner]

You need to make it into an exact equation like this:

solve((6/10) = (y+(q^2/(1764*y/10))),y)

the answers are:

{((-sqrt(-250*q^2+3969)+63)/210),((sqrt(-250*q^2+3969)+63)/210)}

For some reason the CAS couldn't or wouldn't solve it as you wrote it.

-road