\(a,\dfrac{2}{5}-x=\dfrac{1}{4}\)
\(x=\dfrac{2}{5}-\dfrac{1}{4}\)
\(x=\dfrac{8}{20}-\dfrac{5}{20}\)
\(x=\dfrac{3}{20}\)
\(b,\dfrac{4}{7}-x=\dfrac{1}{3}\)
\(x=\dfrac{4}{7}-\dfrac{1}{3}\)
\(x=\dfrac{12}{21}-\dfrac{7}{21}\)
\(x=\dfrac{5}{21}\)
\(c,\dfrac{7}{5}-x=\dfrac{2}{3}\)
\(x=\dfrac{7}{5}-\dfrac{2}{3}\)
\(x=\dfrac{21}{15}-\dfrac{10}{15}\)
\(x=\dfrac{11}{15}\)
#\(Toru\)
\(a>\)
\(\dfrac{2}{5}-x=\dfrac{1}{4}\)
\(x=\dfrac{2}{5}-\dfrac{1}{4}\)
\(x=\dfrac{3}{20}\)
\(b>\)
\(\dfrac{4}{7}-x=\dfrac{1}{3}\)
\(x=\dfrac{4}{7}-\dfrac{1}{3}\)
\(x=\dfrac{5}{21}\)
\(c>\)
\(\dfrac{7}{5}-x=\dfrac{2}{3}\)
\(x=\dfrac{7}{5}-\dfrac{2}{3}\)
\(x=\dfrac{11}{15}\)