Write an equation to represent each of the situations described below.  

1. On Friday, $150$ people went to see “Ode to Algebra” performed in the school auditorium. Both $c$ children and $a$ adults attended the performance.

   Hint (a):

   We know that a total of $150$ people attended the Ode to Algebra. There were two main groups of people
   (the children and the adults) so: $(150-c)$ yields the amount of adults.

2. The cost of a new CD is $$14.95$, and the cost of a video game is $$39.99$. Wade spent $$84.84$ on $c$ CDs and $v$ video games.

   Hint (b):

   Refer to part (a) for help. Use what you know about the problem to create a logical expression.