((2x/100*300+x/100*150)*(300/450)+0.2*150)/450 = (x/100*450+50+(2x/100*300+x/100*150)/450*150)/650

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.