{{c_11 + c_21 = 1},{c_12 + c_22 = 0}, {3c_11 + c_21 = 0}, {3c_12 + c_22 = 1}}

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.