Question
PSLE
Mark sold (8m + 9) highlighters on Thursday. He sold m more highlighters on Friday than on Thursday. How many highlighters did he sell altogether? Give your answer in terms of m in the simplest form.
2 m

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PSLE
Mark sold (8m + 9) highlighters on Thursday. He sold m more highlighters on Friday than on Thursday. How many highlighters did he sell altogether? Give your answer in terms of m in the simplest form.