a) \(4x-9=0\) \(\Leftrightarrow4x=9\) \(\Leftrightarrow x=\dfrac{9}{4}\)
Vậy \(x=\dfrac{9}{4}\)
b) \(-2x+50=0\) \(\Leftrightarrow2x=50\) \(\Leftrightarrow x=25\)
Vậy \(x=25\)
c) \(3x+11=0\) \(\Leftrightarrow3x=-11\) \(\Leftrightarrow x=-\dfrac{11}{3}\)
Vậy \(x=-\dfrac{11}{3}\)