I have this equation:
((a * (1 - t)^2 + 2 * d * (1 - t) * t + g * t^2) - j)^2+((b * (1 - t)^2 + 2 * e * (1 - t) * t + h * t^2) - k)^2 + ((c * (1 - t)^2 + 2 * f * (1 - t) * t + i * t^2) - l)^2 == r^2
Its long and very badly writed but I count on Wolfram to simplify it. But here I have a lot of unknown while in real all variable except $t$ are known, I plan to use it in a video game so even right know I don't know $a$, $b$, $c$, ... These variable will be known at calculation.
So I want to tell Wolfram, only $t$ is unknown and obtain the result $t=a+b^2...$.
Currently I have tried solve [my equation] for $t$ and searched in the equation page but I didn't find my solution.