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Neuron
If you would like to solve 9 <= 17 - 4x for x, you can do this using the following steps:

9 <= 17 - 4x
4x <= 17 - 9
4x <= 8      /4
x <= 8/4
x <= 2

The correct result would be x <= 2.
Leader
[tex]\sf 9 \leq 17-4x\\Add\ 4x\ to\ both\ sides.\\4x+9 \leq 17\\Subtract\ 9\ from\ both\ sides.\\4x \leq 8\\Divide\ by\ 2\ on\ both\ sides.\\x \leq 2\\\\\\{\boxed{x \leq 2}[/tex]

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