a) \(x=\dfrac{1}{3}-\dfrac{5}{6}+\dfrac{1}{4}=\dfrac{4}{12}-\dfrac{10}{12}+\dfrac{3}{12}=-\dfrac{3}{12}=-\dfrac{1}{4}\)
b) \(x-\dfrac{3}{25}=\dfrac{1}{10}-\dfrac{1}{50}=\dfrac{5}{50}-\dfrac{1}{50}=\dfrac{4}{50}=\dfrac{2}{25}\)
\(x=\dfrac{2}{25}+\dfrac{3}{25}=\dfrac{5}{25}=\dfrac{1}{5}\)
1/3 - x = 5/6 -1/4
1/3 - x = 7/12
x= 1/3 - 7/12
x -1/4