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: \[x = 8.7\]
Thus, the solution is: 8.7