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Bonsoir,
[tex]-\dfrac{2}{5}x+\dfrac{1}{4}=0\\\\-\dfrac{2}{5}x=-\dfrac{1}{4}\\\\\dfrac{2}{5}x=\dfrac{1}{4}\\\\x=\dfrac{1}{4}\times \dfrac{5}{2}\\\\x=\dfrac{5}{8}[/tex]
[tex]-\dfrac{2}{5}x+\dfrac{1}{4}=0\\\\-\dfrac{2}{5}x=-\dfrac{1}{4}\\\\\dfrac{2}{5}x=\dfrac{1}{4}\\\\x=\dfrac{1}{4}\times \dfrac{5}{2}\\\\x=\dfrac{5}{8}[/tex]