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Hi there!

To solve this, we have to solve the "d's"

75 * 2 = 150.

-45 * 75 = -3375.

The cubed root of -3375 is -15.

150 + (-15) = 135.

Hope this helped!! ☺♥
altavistard
Just subst. 75 for d in the given expression:

2d + (cube root of -45d).

Thus, 

2(75) + (cube root of -45[75])

which comes out to 150 - 15, or 135 (answer)

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