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

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

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

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

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