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 via inversa 2×2: -3x - 4y = 9 e 12x + 4y = -6
solve via inversa 2×2: -3x - 4y = 9 e 12x + 4y = -6
Natural Language
Math Input
Extended Keyboard
