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.
3 个方程的方程组: \begincases a + b + c = 10 }, {a - b + c = 4 }, {a + b - c = 6 \endcases 。
3 个方程的方程组: \begincases a + b + c = 10 }, {a - b + c = 4 }, {a + b - c = 6 \endcases 。
Natural Language
Math Input
Extended Keyboard