a. Let the cost of an adult ticket be x and Let the cost of an children's ticket be y
We can deduce that;
[tex]155x+230y=1285.5[/tex]Also Mrs. Ramirez paid 53.75 for 2 adult tickets and 3 children tickets, so;
[tex]2x+3y=53.75[/tex]We can solve this simultaneously for x and y.
So, we have;
[tex]\begin{gathered} 155x+230y=1285.5----i \\ 2x+3y=53.75\text{ ----i}i \end{gathered}[/tex]Let's make x the subject of the relation, we have
[tex]\begin{gathered} 2x=53.75-3y \\ x=\frac{53.75-3y}{2} \\ \end{gathered}[/tex]Let us substitute this relation for x in equation i
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