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