# Math Help - 3 variables(constants) with 3 equations derived from calculus.

1. ## 3 variables(constants) with 3 equations derived from calculus.

I've tried multiple ways yet still cant find the write combination to solveing for x y and z, they are known as constant.

$5.3 = ( x-y*e^(-z) ) / z$

$7.7 = ( x-y*e^(-3z) ) / z$

$8.95 = ( x-y*e^(-5z) ) / z$

I apologize if this post is in the wrong topic and would gladly delete this and repost it in the right topic if suggested.

2. Are you expecting real-valued solutions? WolframAlpha finds only complex solutions:

5.3=(x-y*e^(-z))/z, 7.7=(x-y*e^(-3z))/z, 8.95=(x-y*e^(-5z))/z - Wolfram|Alpha

3. Thanks, i was but this will help me alot