2 less than 3 times n is 4 more than n

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2 less than 3 times n is 4 more than n

3 times n:
3n

2 less than 3 times n
3n - 2

4 more than n:
n + 4

The word is means equal to, so we set 3n - 2 equal to n + 4:
3n - 2 = n + 4