Let j denote the amount that Jim earned.
Let d denote the amount that Debbie earned.
Last month, Jim and Debbie earned $7,200
Mathematically, we can write it as
[tex]j+d=7200[/tex]
Debbie earned $1,600 more than Jim earned.
Mathematically, we can write it as
[tex]d=j+1600[/tex]
Therefore, the system of equations is
[tex]\begin{gathered} j+d=7200 \\ d=j+1600 \end{gathered}[/tex]
