Question

va rog frumos repede
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Answer 1

$\dfrac{x - 4}{5} - \dfrac{6\cdot2x}{40} = \dfrac{x - 4}{5} - \dfrac{6x}{20} = \dfrac{x - 4}{5} - \dfrac{3x}{10} =\dfrac{ 2(x - 4) - 3x}{10} = \dfrac{2x - 8 - 3x}{10} = \dfrac{ - x - 8}{10} = - \dfrac{x + 8}{10}$