Substitution
posted by Myah .
There are 155 people at the basketball game. Tickets for the game are $2.50 for students and $4 for adults. If the total ticket money received is $492.50 how many students and adults attended the game?

Substitution 
PsyDAG
A = 155  S
$2.50S + $4.00A = $492.50
Substitute 115S for A in the second equation and solve for S. Insert that value into the first equation to solve for A. Check by putting both values into the second equation.
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