Question

in a party of school,290 tickets had been sold.if the selling price to the student in the school is one dollar and for his guest the selling price is 3 dollars.the selling price for all sold tickets is 490$ ,find then number of sold tickets from each kind

Answer 1

s + g = 290....s = 290 - g
s + 3g = 490

290 - g + 3g = 490
2g = 490 - 290
2g = 200
g = 200/2
g = 100 <=== 100 guest tickets were sold

s + g = 290
s + 100 = 290
s = 290 - 100
s = 190 <=== 190 student tickets sold