325 adult tickets were sold
Solution:
Let "a" be the number of adult tickets sold
Let "s" be the number of student tickets sold
Given that total 706 tickets were sold for the school play
Therefore,
number of adult tickets sold + number of student tickets sold = 706
a + s = 706 --------- eqn 1
There were 56 more student tickets sold than adult tickets
Number of student tickets sold = 56 + number of adult tickets sold
s = 56 + a ------- eqn 2
Let us solve eqn 1 and eqn 2
Substitute eqn 2 in eqn 1
a + 56 + a = 706
2a + 56 = 706
2a = 706 - 56
2a = 650
a = 325
Thus 325 adult tickets were sold