SOLUTION: a theater is set up in a way which there are 20 seats in the first row and four additional seats in each row. The last row has 144 seats. how many rows are there?
Algebra ->
Customizable Word Problem Solvers
-> Misc
-> SOLUTION: a theater is set up in a way which there are 20 seats in the first row and four additional seats in each row. The last row has 144 seats. how many rows are there?
Log On
Question 447575: a theater is set up in a way which there are 20 seats in the first row and four additional seats in each row. The last row has 144 seats. how many rows are there?
You can put this solution on YOUR website! The n-th row will have 20 + 4(n-1) seats
So we need to solve the following for n:
144 = 20 + 4(n-1)
124 = 4n - 4
128 = 4n
n = 32
So there are 32 rows
