hello
the standard linear equation can be written as
[tex]\begin{gathered} x+y=z \\ \text{where z = any variable} \end{gathered}[/tex]
in the question here, the options that corresponds to the answer here are
[tex]\begin{gathered} 3x+y=8 \\ x+4y=12 \\ 5x+24y=544 \end{gathered}[/tex]
