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.
7^(1-x)-4^(3x+1), x=\frac{log_7 (4)-1}{-1-3 \log_7 (4)}
7^(1-x)-4^(3x+1), x=\frac{log_7 (4)-1}{-1-3 \log_7 (4)}
Natural Language
Math Input
Extended Keyboard