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Netchkin · Answer 1 · 2020-01-02T00:13:51+0000

Answer:

11x + 4d

Explanation:

8x + 9d + 3x -5d

Group like terms.

= 8x + 3x + 9d - 5d

Add similar elements: 9d - 5d = 4d

= 8x + 3x + 4d

Add similar elements: 8x + 3x = 11x

= 11x + 4d