Question
PSLE
Ryan sold (9f + 9) markers on Tuesday. He sold f more markers on Wednesday than on Tuesday. How many markers did he sell altogether? Give your answer in terms of f in the simplest form.
2 m

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PSLE
Ryan sold (9f + 9) markers on Tuesday. He sold f more markers on Wednesday than on Tuesday. How many markers did he sell altogether? Give your answer in terms of f in the simplest form.