Assuming x, y, and z are positive real numbers satisfying:
xy - z = 15
xz - y = 15
yz - x = 15
then, what is the value of xyz ?
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.
