$$2-\frac{3m}{5}=\frac{2m}{4}$$
$m = \frac{20}{11} = 1\frac{9}{11} \approx 1.818181818$
$$40-4\times 3m=5\times 2m$$
$$40-12m=5\times 2m$$
$$40-12m=10m$$
$$40-12m-10m=0$$
$$40-22m=0$$
$$-22m=-40$$
$$m=\frac{-40}{-22}$$
$$m=\frac{20}{11}$$
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