Question

$2/5x=4$

me ajudaaaaaaaaaaaaaaaaa

Answer 1

Veja qual das duas corresponde a sua dúvida.
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$\frac{2x}{5} =4\\ \\x=\frac{5\cdot4}{2}\\ \\x=10\\ \\S=\{10\}$
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$\frac{2}{5x} =4\\ \\5x\cdot4=2\\ \\20x=2\\ \\x=\frac{2^{:2}}{20_{:2}}\\ \\x=\frac{1}{10}\\ \\S=\{ \frac{1}{10}\}$
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