To solve the equation \(-\frac{x}{2.9} = -3\), you can follow these steps:
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Multiply both sides by -1, which gives: \(\frac{x}{2.9} = 3\)
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Next, multiply both sides by 2.9 to isolate \(x\): \(x = 3 \times 2.9\)
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Calculate \(3 \times 2.9\): \(3 \times 2.9 = 8.7\)
Thus, the solution is \(x = 8.7\).
The correct answer is: 8.7.