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(3x+6)/(3x+6)

That's the only one.

Just kidding. There are an infinite number of equations that can always equal 1.

The previous solution is incorrect, as for x=-2 that expression is undefined as we are dividing by zero. A correct solution would be something like 0x+1, quite boring though.

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12y ago
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Q: What equation always equals 1?
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