Question
$$-2+45f-3 = f$$
Answer
$$ f = \dfrac{5}{44} $$
Explanation
$$ \begin{aligned} -2+45f-3 &= f&& \text{simplify left side} \\[1 em]45f-5 &= f&& \text{move the $ \color{blue}{ f } $ to the left side and $ \color{blue}{ -5 }$ to the right} \\[1 em]45f-f &= 5&& \text{simplify left side} \\[1 em]44f &= 5&& \text{ divide both sides by $ 44 $ } \\[1 em]f &= \frac{5}{44}&& \\[1 em] \end{aligned} $$
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