To solve the equation \(-\frac{x}{2.9} = -3\), follow these steps:
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Multiply both sides by -1 to eliminate the negative signs: \[ \frac{x}{2.9} = 3 \]
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Multiply both sides by 2.9 to isolate \(x\): \[ x = 3 \times 2.9 \]
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Calculate the right side: \[ x = 8.7 \]
Therefore, the solution is \(8.7\).
So the correct response is: 8.7