This text can be "translated" as
[tex]5-z=4[/tex]Then let's solve that equation to "z", to solve that equation let's subtract 5 on both sides
[tex]\begin{gathered} -5+5-z=4-5 \\ \\ -z=4-5 \\ \\ -z=-1 \end{gathered}[/tex]We have minus on both sides, then let's multiply both by (-1) and get the value of z
[tex]\begin{gathered} -z=-1 \\ \\ z=1 \end{gathered}[/tex]Therefore z is equal to 1
