Translate the sentence into an equation. Use x to represent the unknown number. 10 times a number, increased by 1, is the same as 12 times the number, decreased by 9.
A. 10(x + 1) = 12(x - 9)
B. 10x + 9 = 12x - 1
C. 10x + 1 = 12x - 9
D. 10(x - 9) = 12(x + 1)
Answer: C
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