System

What is the value of xyz ?

Hello Guest!

$xy - z = 15\\ xz - y = 15\\ yz - x = 15$

$z=xy-15\\ z=\frac{15-y}{x}\\ z=\frac{15-x}{y}$

$xy-15=\frac{15-y}{x}\\ \frac{15-y}{x}=\frac{15-x}{y}\\ ok\ Max.$

Please refer to this post: https://web2.0calc.com/questions/help-system_5

It is the exact same as this one.