lilrobbie8308 lilrobbie8308

22-03-2022
Mathematics

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18. 9 decreased by twice a number is equal to 9. 9. What is the number?

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arsemagetachew14 arsemagetachew14

23-03-2022

Twice means two times

18.9 - 2x = 9.9

18.9 -18.9 -2x=9.9 - 18.9

-2x=9.9 - 18.9

(-2x= -9) divide both sides by negative two

-2x/-2 = -9/-2

x=4.5

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