30 is equal to twice a number number c decreased by 4.
30 = 2c - 4
calculate
-2c = -4 - 30
-2c = -34
c = 17
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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
c = 17
The number is 17