To solve this equation, we can start by simplifying the left side: (975.12 - 940.5) / (975.12 - 927.96) = 34.62 / 47.16 Now, let's simplify the right side: (10% - A) / (10% - 12%) = -A / (-2%) Next, we can cross multiply: (34.62 / 47.16) = (-A / (-2%)) To remove the percentages, we can divide both sides by 100: (34.62 / 47.16) / 100 = (-A / (-2%)) / 100 0.736 / 100 = (-A / (-0.02)) Now, let's simplify the equation further: 0.00736 = (-A / (-0.02)) To eliminate the negative signs, we can divide both sides by -1: -0.00736 = A / 0.02 Now, to solve for A, we can multiply both sides by 0.02: A = -0.00736 * 0.02 A = -0.0001472 Therefore, A is approximately -0.0001472.

總結

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