\(\frac{5}{6} + \left [ \frac{2}{3}x - \left ( \frac{-7}{12} \right ) \right ]= \frac{1}{2}\)
\(\frac{2}{3}x + \frac{7}{12}= -\frac{1}{3}\)
\(\frac{2}{3}x = - \frac{1}{3} - \frac{7}{12}\)
\(\frac{2}{3}x= -\frac{11}{12}\)
\(x= - \frac{11}{8}\)
Vậy \(x= - \frac{11}{8}\)
b) \(\frac{x}{15} + 1,2= \frac{1}{3}\)
\(\frac{x}{15}= \frac{1}{3} - 1,2\)
\(\frac{x}{15}=- \frac{13}{15}\)
x = - 13
Vậy x = - 13
câu c pn coi lại đề nhé
d) 3 + \(\left | x - 1,34 \right |\) = 5
\(\left | x - 1,34 \right |\) = 5 - 3
\(\left | x - 1,34 \right |\) = 2
\(\Leftrightarrow \begin{bmatrix} x - 1,34 = 2 & & \\ x - 1,34= 2 & & \end{bmatrix}\) \(\Leftrightarrow \begin{bmatrix} x= 3,34 & & \\ x = - 0,66 & & \end{bmatrix}\)
(bỏ dấu ngoặc bên phải nha pn)
Vậy x = 3,34; x = - 0,66
câu e pn lm tương tự