Since 78 people said they are coming already, and the place can hold a maximum of 125 people. Abha can invite a certain number of people (say x) such that the total number of attendees, ie x + 78 does not exceed 125.
In inequality form;
[tex]x+78\leq125[/tex]We can go for the solution;
[tex]\begin{gathered} x+78\leq125 \\ x\leq125-78 \\ x\leq47 \end{gathered}[/tex]Thus the inequality is
[tex]\begin{gathered} x+78\leq125 \\ \text{and the solution is} \\ x\leq47 \end{gathered}[/tex]