Câu trả lời:
Ta có
\(\text{|3x - 4| + |3y + 5| = 0}\)
\(\left|3x-4\right|\ge0;\left|3y-5\right|\ge0\)
\(\Rightarrow\hept{\begin{cases}\left|3x-4\right|=0\\\left|3y-5\right|=0\end{cases}\Rightarrow\hept{\begin{cases}3x-4=0\\3y-5=0\end{cases}}}\Rightarrow\hept{\begin{cases}3x=4\\3y=5\end{cases}\Rightarrow\hept{\begin{cases}x=\frac{4}{3}\\y=\frac{5}{3}\end{cases}}}\)