$$24-9\times2=24-18=6$$
$\text{true}$
$$24-18=24-18\text{ and }24-18=6$$
$$6=24-18\text{ and }24-18=6$$
$$6=6\text{ and }24-18=6$$
$$\text{true}\text{ and }24-18=6$$
$$\text{true}\text{ and }6=6$$
$$\text{true}\text{ and }\text{true}$$
$$\text{true}$$
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