Question

Answer 1

bai 6

hang 1

\(-\dfrac{2}{3}x=\dfrac{4}{15}\\ x=\dfrac{4}{15}:\left(-\dfrac{2}{3}\right)\\ x=-\dfrac{2}{5}\)

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\(-\dfrac{7}{19}x=-\dfrac{13}{24}\\ x=-\dfrac{13}{24}:\left(-\dfrac{7}{19}\right)\\ x=\dfrac{247}{168}\)

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\(-\dfrac{2}{5}+\dfrac{5}{6}x=-\dfrac{4}{15}\\ \dfrac{5}{6}x=-\dfrac{4}{15}-\left(-\dfrac{2}{5}\right)\\ \dfrac{5}{6}x=\dfrac{2}{15}\\ x=\dfrac{2}{15}:\dfrac{5}{6}\\ x=\dfrac{4}{25}\)

hang 2

\(\dfrac{2}{3}+\dfrac{7}{4}:x=\dfrac{5}{6}\\ \dfrac{7}{4}:x=\dfrac{5}{6}-\dfrac{2}{3}\\ \dfrac{7}{4}:x=\dfrac{1}{6}\\ x=\dfrac{7}{4}:\dfrac{1}{6}\\ x=\dfrac{21}{2}\)

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\(2x+\dfrac{1}{2}=-\dfrac{5}{3}\\ 2x=-\dfrac{5}{3}-\dfrac{1}{2}\\ 2x=-\dfrac{13}{6}\\ x=-\dfrac{13}{6}:2\\ x=-\dfrac{13}{12}\)

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