$$9x-16( \frac{ 7 }{ 4 } )=7$$
$x = \frac{35}{9} = 3\frac{8}{9} \approx 3.888888889$
$$9x-\frac{16\times 7}{4}=7$$
$$9x-\frac{112}{4}=7$$
$$9x-28=7$$
$$9x=7+28$$
$$9x=35$$
$$x=\frac{35}{9}$$
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