You can
put this solution on YOUR website!This is not clear exactly what you mean. Do you mean:

?
If so, then remember this one?

means that
Likewise:

means that
Multiply the parentheses:
Get all the variables on the right side by subtracting 12u from each side:
Add +42 to each side:
Divide both sides by 9
That's a pretty ugly answer, but that's life sometimes!! It's a hard problem to check, and the check on one like this is probably harder than just solving it again. If anyone finds an error, please send me an Email so I can fix it!!
R^2 at SCC