Question 156589
"A total of 700 tickets were sold for a musical" __ s+c+a=700


"Senior citizen tickets sold for $15, children tickets sold for $20, and adult tickets sold for $25; the total earnings from ticket sales was $15,750" __ 15s+20c+25a=15750 __ 3s+4c+5a=3150


"Five times more children tickets were sold than senior citizen tickets" __ c=5s __ -5s+c+0a=0


[1 1 1 | 700]
[3 4 5 | 3150]
[-5 1 0 | 0]