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.
solve( 2.77 * P + 1.77 L = 2.77 * ( P + D ) + 1.77 * ( L - 10 ), D )
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random