250 * (1 + 2.10 + 0.30 + 0.42 + 0.25 + 0.15 + x)=441 * (1 + 0.30 + 0.42 + 0.25 + 0.21 + x)

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.