Let x be a number. Translate the following into an expression or an equation, as appropriate, and then simplify the expression or solve the equation.Negative three times the sum of x and three is equal to x minus the difference of x and twelve.

A. -3(x + 3) = x - (x - 12);  1
B. -3(x + 3) = x - (12 - x);  -3
C. -3(x + 3) = x - (12 - x);  1
D. -3(x + 3) = x - (x - 12);  -7


Answer: D

Mathematics

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