a) \(x-\frac{1}{4}=\frac{5}{8}\times\frac{2}{3}=\frac{5}{12}\)
\(\Rightarrow x=\frac{5}{12}+\frac{1}{4}=\frac{2}{3}\)
b) \(\frac{x}{123}=\frac{-5}{9}\times\frac{4}{7}=-\frac{20}{63}\)
\(\Rightarrow x=-\frac{20}{63}\times123=-\frac{820}{21}\)
a. x - 1/4 = 5/12
x = 5/12 - 1/4
x = 1/6
tích mình nhé lát mình gửi nốt pần b
b. x/123 = -20/63
x = -20/63 x 123
x = -820/21