Question 214148
d = door tickets
a = advanced
----------------------
d = 206 + a
10d+ 6a = 6828
since we already have what d =, plug that into the second equation;

10(206 + a)+6a = 6828
2060 + 10a + 6a = 6828
Collect like terms and subtract 2060 from both sides;
16a = 4768
a= 298
Now plug that into the first equation;
 d = 206 + 298
d = 504
------------------
Door tickets = 504
advanced tickets = 298
:)