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11-10-2018
Mathematics

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the sum of a number 9 is multiplied by -2 and the answer is -8

find the number.

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OmegaAzzy OmegaAzzy

11-10-2018

The missing number is equal to -5.

-2(x + 9) = -8

Distributive property.

-2x - 18 = -8

Add 18 to both sides.

-2x = 10

Divide both sides by -2.

x = -5

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