15n, A box contains n chocolates. How many chocolates in 15 boxes?, n + 7, A plant is ncm tall. It grows a further 7cm. How tall is it now?, 15 - n, A piece of ribbon in 15cm long. How many cm remain if I cut ncm off?, n - 15, A box contains n chocolates. 15 are eaten. How many are left?, 7n, A brick weighs nkg. How much do 7 bricks weigh?, n + 7 - m, A book costs $n. It goes up in price by $7. It is then reduced by $m. What is its new price?, n + 7 + m, A man walks n metres, jogs 7 metres, and them walks for another m metres. How far has he moved?, 7n - 3, A man buys 7 boxes containing n pencils each. He loses three pencils. How many are left?, 7 (n - 3), A book costing $n is reduced by $3. A man buys 7 of them. How much does it cost him?

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