Question

This half my grade i cant fail help

Answer 1

Let's see what to do buddy....

$T = b + \frac{d}{2f}$

Subtract sides b

$T - b = b - b + \frac{d}{2f}$

Simplification

$T - b = \frac{d}{2f}$

Multiply sides by 2f

$(T - b)(2f) = d$

So ;

$d =( T - b) \times (2f)$

We're done but i wanna go one step more...

$d = T \times 2f - b \times 2f$

$d = 2Tf - 2bf$

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Hope helped buddy....♥️♥️♥️♥️♥️

Good luck :)