Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
((a*44) + ((79 - a)*45) + (1*89))/80 = 45
((a*44) + ((79 - a)*45) + (1*89))/80 = 45
Natural Language
Math Input
Extended Keyboard
