a) $\frac{-3}{2}$ - 2x + $\frac{3}{4}$ = -2
$\frac{-3}{2}$ - 2x = -2 - $\frac{3}{4}$
$\frac{-3}{2}$ - 2x = $\frac{-11}{4}$
2x = $\frac{-3}{2}$ + $\frac{11}{4}$
2x = $\frac{5}{4}$
x = $\frac{5}{4}$ : 2
x = $\frac{5}{8}$
b) l x - 1,5 l = 2
l x - $\frac{3}{2}$ l = 2
=> \(\left[ \begin{array}{l}x-\frac{3}{2}=2\\x-\frac{3}{2}=-2\end{array} \right.\)
=> \(\left[ \begin{array}{l}x=2+\frac{3}{2}\\x=2+\frac{3}{2}\end{array} \right.\)
=> \(\left[ \begin{array}{l}x=\frac{7}{2}\\x=\frac{-1}{2}\end{array} \right.\)
c) ( x+5 )³ = -64
( x+5 )³ = -4³
=> x + 5 = -4
=> x = -4 - 5
=> x = -9
Xin hay nhất ạ :)