we can write a equation for each statement
The receipts were $3331.50
[tex]2g+6.50r=3331.50[/tex]where g is the number of general ticket and r the number of reserverd ticket
930 paid admissions
[tex]g+r=930[/tex]
we have two equations, we can solve a variable for the second equation an replace on the firts, i will solve g
[tex]g=930-r[/tex]now replace on the first equation to solve r
[tex]\begin{gathered} 2g+6.50r=3331.50 \\ 2(930-r)+6.50r=3331.50 \\ 1860-2r+6.50r=3331.50 \\ 6.50r-2r=3331.50-1860 \\ 4.50r=1471.50 \\ r=\frac{1471.50}{4.50} \\ \\ r=327 \end{gathered}[/tex]the number of reserved tickets is 327
now replace r=327 on the second equation to find g
[tex]\begin{gathered} g+r=930 \\ g+(327)=930 \\ g=930-327 \\ g=603 \end{gathered}[/tex]the number of general tickets is 603