A total of 770 tickets were sold for the school play. They were either adult tickets or student tickets. There were 70 more student tickets sold than adult tickets. How many adult tickets were sold?

Answer 1

s = a + 70
s+a=770

so
(a+70) + a = 770

2 a + 70 = 770
2 a = 700
a = 350

Answer 2

350