x*z + x = 6
6*x*z + z = 6
(6*x)*z + z = 6
-0.198725804412536
-31.1923548264752
5.03205913774587
0.192354826475216
x1 = -0.198725804412536 z1 = -31.19235482647522
x2 = 5.032059137745869 z2 = 0.1923548264752158