A bookstore sold 18,000 paperbacks one month. This was 10% less than the number of paperbacks the store sold the previous month. The following equation represents this situation, where x represents the number of paperbacks sold the previous month.

x - 0.1x = 18,000

How many paperbacks did the store sell in both months combined?

Question

A bookstore sold 18,000 paperbacks one month. This was 10% less than the number of paperbacks the store sold the previous month. The following equation represents this situation, where x represents the number of paperbacks sold the previous month.

x - 0.1x = 18,000

How many paperbacks did the store sell in both months combined?

anonymous · Answer

$$x-.1x=18000 , x=20,000$$
now for two months
x+.9x =20000+18000

anonymous · Answer

i dont get how you got that @jithinkv

anonymous · Answer

if x is the no. of books sold in first month.
10% of x is .1x.
Now for the second month, sales were 10% less , right? so we get an equation as
x-.1x =18000. 
U are clear upto this ?
Now sales for the two months is
x + (x-.1x)= ? is the ques.
we get value of x from 1st eqn. plug it in the 2nd, there u are