Question

A theater can seat 170 people. The number of rows is 7 less than the number of seats in each row. How many rows of seats are there?

Answer 1

Answer:number of rows =10
number of places in row = 17

Explanation:
number of rows =N
number of places in row = N+7
N(N+7)=170
N^2+7n-170=0
(N+17)(N-10)=0
N1=-17
N2=10
We can`t take negative value for quantity of smth so we throw N1 away
From that number of rows =10
number of places in row = 10+7=17