To solve the equation \( x - 5 = -6 \), you actually do not need to multiply both sides by any number; instead, you can isolate \( x \) by adding 5 to both sides of the equation.
Here's how you do it step by step:
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Start with the original equation: \[ x - 5 = -6 \]
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Add 5 to both sides: \[ x - 5 + 5 = -6 + 5 \]
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Simplify: \[ x = -1 \]
So, the value of \( x \) is \(-1\).
To address your question directly: there is no specific number that you need to multiply both sides by to solve this equation; adding is the appropriate operation here.