$$\frac{ 2t-3 }{ 7 } =4$$
$t = \frac{31}{2} = 15\frac{1}{2} = 15.5$
$$2t-3=4\times 7$$
$$2t-3=28$$
$$2t=28+3$$
$$2t=31$$
$$t=\frac{31}{2}$$
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