a) x/12 = -1/24 - 1/8
x/12 = -1/6
x/12 = 2/12
x = 2 X 12 : 12
Vậy x = 2
b) 2/3 . x - 1/2 .x = 5/4
x.(2/3-1/2) = 5/4
x.1/6 = 5/4
x = 5/4 :1/6
Vậy x = 15/2
mình đã trình bày rõ ràng rồi, k cho mình đi.
a) \(\frac{x}{12}=\frac{-1}{24}-\frac{1}{8}\)
\(\Rightarrow\frac{x}{12}=\frac{-1}{6}\)
\(\Rightarrow x=\frac{-1}{6}.12\)
\(\Rightarrow x=-2\)
Vậy x = -2
b) \(\frac{2}{3}.x-\frac{1}{2}.x=\frac{15}{12}\)
\(\Rightarrow x\left(\frac{2}{3}-\frac{1}{2}\right)=\frac{15}{12}\)
\(\Rightarrow x.\frac{1}{6}=\frac{15}{12}\)
\(\Rightarrow x=\frac{15}{12}\div\frac{1}{6}\)
\(\Rightarrow x=\frac{15}{2}\)
Vậy \(x=\frac{15}{2}\)
