Question 1202396
Children, c
Adults, 120-c


{{{2c+3.5(120-c)=324}}}

{{{2c+(3.5)(120)-3.5c=324}}}

{{{(2-3.5)c=324-(3.5)(120)}}}

{{{(3.5-2)c=(3.5)(120)-324}}}

{{{highlight_green(c=((3.5)(120)-324)/(3.5-2))}}}
.
.