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To solve for x, we can first simplify the equation by multiplying both sides by 3 to get rid of the fraction:
(1/3)x - 4 = -12
3 * (1/3)x - 3 * 4 = -12
x - 12 = -12
Next, we can add 12 to both sides of the equation to isolate x:
x - 12 + 12 = -12 + 12
x = 0
Therefore, the solution is x = 0.