Question 155887
Remember:
{{{Adult=A=25.00}}}
{{{Children=C=15.00}}}
Total attendance =400, so {{{A+C=400}}} ----------------------> eqn 1
Total receipts = $7200.00:
{{{25.00A+15.00C=7200}}} --------------------------------------> eqn 2
In eqn 1 we get, {{{C=400-A}}} --> substitute in eqn 2:
{{{25A+15(400-A)=7200}}}
{{{25A+6000-15A=7200}}}
{{{10A=7200-6000}}}
{{{10A=1200}}} -----> {{{cross(10)A/cross(10)=cross(1200)120/cross(10)}}}
{{{A=120}}} --------------------> no. of Adults attended
For Children, go back eqn 1:
{{{120+C=400}}}
{{{C=400-120=280}}} ------------> no. of Children attended
In doubt? go back eqn 2:
{{{25*120-15*280=7200}}}
{{{3000+4200=7200}}}
{{{7200=7200}}}
Thank you,
Jojo