Tìm y & x:
\(a.y+\dfrac{1}{2}=\dfrac{7}{8}\)
\(b.y-\dfrac{4}{9}=\dfrac{13}{5}\)
\(c.\dfrac{2}{5}+x=\dfrac{7}{3}\)
\(d.x-\dfrac{1}{7}=\dfrac{-4}{3}+\dfrac{11}{7}\)
\(e.y:1\dfrac{5}{7}=\dfrac{-21}{48}\)
\(f.\dfrac{7}{5}:y=-3,5\)
\(g.\left(\dfrac{-3}{11}-y\right)\left(\dfrac{2}{3}+\dfrac{1}{9}\right)=\dfrac{2}{5}\)
a: y=7/8-1/2=3/8
b: \(y=\dfrac{13}{5}+\dfrac{4}{9}=\dfrac{117+20}{45}=\dfrac{137}{45}\)
c: \(x=\dfrac{7}{3}-\dfrac{2}{5}=\dfrac{35-6}{15}=\dfrac{29}{15}\)
d: \(x=\dfrac{-4}{3}+\dfrac{11}{7}+\dfrac{1}{7}=\dfrac{-4}{3}+\dfrac{12}{7}=\dfrac{-28+36}{21}=\dfrac{8}{21}\)
e: \(y=-\dfrac{7}{15}\cdot\dfrac{12}{7}=\dfrac{-12}{15}=-\dfrac{4}{5}\)
