Question

pfvr me ajudem rápido
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Answer 1

Resposta:

$- \frac{1}{2} x + \frac{2}{5} x = \frac{5 \times - 1x + 4x}{10 } \\ = - \frac{1x}{10} \\ \\ \frac{3 {m}^{3} }{4} \div \frac{1 {m}^{2} }{3} \\ \frac{3 {m}^{3} }{ \frac{4}{ \frac{1 {m}^{2} }{3} } } \\ \frac{9}{4} m$