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Q: What is the perimeter of 7n plus 2 plus 6 plus 5n plus 7n plus 3n equals?

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3n+5n=8n

4n

3n + 2n = 7 + 4n 5n = 7 + 4n 5n - 4n = 7 n = 7

-3n+5n+4 = -4 2n = -4-4 2n = -8 n = -4

5n + 7 = 28 + 2n (-2n) 3n + 7 = 28 (-7) 3n = 21 therefore, n = 7

5n = 2n + 3n .

3n + 2n = 25 5n = 25 n = 5

7n - 2 + 3n + 4 = 7n + 3n - 2 + 4 = 10n + 2 which can be simplified to 2(5n +1)

5n + 12 = 3n Try to get all expressions with n on the left side 5n + 12 - 3n = 3n - 3n 2n + 12 = 0 Try to get rid of 12 on the left side 2n + 12 - 12 = -12 2n = -12 n = -12/2 = -6

Subract 5n from both sides and you get 9=-3n, then divide bother sides by -3 and you get n= -3

A - B = -3n + 2 - (5n - 7) = -3n + 2 - 5n + 7 = 9 - 8n

3n+18 !

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