Question 1206576
y adults
72-y children


{{{3.5y+1.5(72-y)=192}}}


{{{3.5y-1.5y+1.5*72=192}}}

{{{(3.5-1.5)y=192-1.5*72}}}

{{{y=(192-1.5*72)/(3.5-1.5)}}}

{{{highlight(y=42)}}}{{{adults}}}
{{{and}}}
{{{highlight(30)}}}{{{children}}}