$$\quad \frac { 3 ( d - 2 ) } { 9 } + 5 = 7$$
$d=8$
$$3\left(d-2\right)+45=63$$
$$3d-6+45=63$$
$$3d+39=63$$
$$3d=63-39$$
$$3d=24$$
$$d=\frac{24}{3}$$
$$d=8$$
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