|3x+1/2|=5
Th1:3x+1/2 = 5
2x = 9/2
x= 9/4
Th2: 3x + 1/2 = -5
3x = -11/2
x= -11/6
Vậy x= 9/4 và x= -11/6
\(\left|3x+\frac{1}{2}\right|=5< =>\orbr{\begin{cases}3x+\frac{1}{2}=5\\3x+\frac{1}{2}=-5\end{cases}}\)
\(< =>\orbr{\begin{cases}3x=5-\frac{1}{2}=\frac{9}{2}\\3x=-5-\frac{1}{2}=-\frac{11}{2}\end{cases}< =>\orbr{\begin{cases}x=\frac{9}{2}:3=\frac{3}{2}\\x=-\frac{11}{2}:3=-\frac{11}{6}\end{cases}}}\)
Vậy x=3/2 hoặc x=-11/6