SOLUTION: In an office building, a room contains 48 chairs. The number of chairs per row is 10 less than twice the number of rows. find the number of rows. Thanks!

SOLUTION: In an office building, a room contains 48 chairs. The number of chairs per row is 10 less than twice the number of rows. find the number of rows. Thanks!

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Question 378932: In an office building, a room contains 48 chairs. The number of chairs per row is 10 less than twice the number of rows. find the number of rows.
Thanks!
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
Let x be the number of chairs/row and r be the number of rows.
You are told

and

So

So r can be either 8 or -3. Since the number of rows can't be negative,
there must be 8 rows.
If there are 8 rows, then
thus
8 rows of 6 chairs each

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