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30 is equal to ice a number number c decreased by 4​

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30 is equal to twice a number number c decreased by 4.

30 = 2c - 4

calculate

-2c = -4 - 30

-2c = -34

[tex] \frac{ - 2c}{ - 2} = \frac{ - 34}{ - 2} [/tex]

c = 17

The number is 17

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