$$3=-\frac{\frac{4}{5}}{\frac{2}{3}}-\frac{3}{10}$$
$\text{false}$
$$3=-\frac{4}{5}\times \frac{3}{2}-\frac{3}{10}$$
$$3=-\frac{4\times 3}{5\times 2}-\frac{3}{10}$$
$$3=-\frac{12}{10}-\frac{3}{10}$$
$$3=\frac{-12-3}{10}$$
$$3=\frac{-15}{10}$$
$$3=-\frac{3}{2}$$
$$\frac{6}{2}=-\frac{3}{2}$$
$$\text{false}$$
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