Question

the sum of 7m, n, 2m and 3n is
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Answer 1

Step-by-step explanation:

9n + 4n is the sum of your question,

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Answer 2

Answer:

9m + 4n

Step-by-step explanation:

7m and 2m have same variables, m. So they will add.

Similarly, n and 3n have same variable, n.