Question 1204593
<pre>
                   PRICE          HOW MANY      COST

ADULT TICKETS        45             x            45x

CHILD TICKETS        37             x+3         37(x+3)

Totals                                          521
</pre>
You will most likely understand that, and know what to do.




You wanted a SYSTEM of equations?

<pre>
                   PRICE          HOW MANY      COST

ADULT TICKETS        45             x            45x

CHILD TICKETS        37             y            37y

Totals                                          521

AND   y-x=3
</pre>
This way you would have  {{{system(45x+37y=521,and,-x+y=3)}}}.