Question 230652
"There were 500 people at a play" ___ a + c = 500


"$2.00 for adults and $1.00 for children. The admission receipts were $690.00" ___ 2a + c = 690


subtracting 1st eqn from 2nd eqn ___ a = 190


substituting ___ 190 + c = 500 ___ c = 310