A hall in Bhopal has r rows of chairs. Every row should have 7 chairs, but the last row is missing some chairs (dashed outlines). Which expression gives the number of chairs in the hall?

Question

Accepted Answer

7r − 3. If every row were full there would be 7 × r = 7r chairs. The last row is 3 short, so total = 7r - 3 .

A hall in Bhopal has r rows of chairs. Every row should have 7 chairs, but the last row is missing some chairs (dashed outlines). Which expression gives the number of chairs in the hall?

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