hello I scanned a question and it did not put the right question in

Simplify the equation 7/z=84/12 by cross product of the numerator and denominator.
[tex]\begin{gathered} \frac{7}{z}=\frac{84}{12} \\ 7\cdot12=84\cdot z \\ z=\frac{7\cdot12}{84} \\ =\frac{84}{84} \\ =1 \end{gathered}[/tex]So value of z is 1.