Question

a)½ : x - ⅚ = - ⅔ b) 20%. x + ⅝ - x .0 ,5= ¹¹/₂₀

Answer 1

\(a,\dfrac{1}{2}:x-\dfrac{5}{6}=-\dfrac{2}{3}\)

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

\(\dfrac{1}{2}:x=\dfrac{1}{6}\)

\(x=\dfrac{1}{2}.6=3\)

\(b,20\%.x+\dfrac{5}{8}-x.0,5=\dfrac{11}{20}\)

\(\dfrac{1}{5}.x+\dfrac{5}{8}-x.\dfrac{1}{2}=\dfrac{11}{20}\)

\(x\left(\dfrac{4}{20}-\dfrac{10}{20}\right)=\dfrac{11}{20}-\dfrac{5}{8}\)

\(x.\left(\dfrac{-3}{10}\right)=\dfrac{-3}{40}\)

\(x=\dfrac{-3}{40}.\dfrac{-10}{3}\)

\(x=\dfrac{1}{4}\)