Tìm x, y biết: |x – 2| = 2; |y – 1| = 9

|x – 2| = 2

⇒ \(\left[ \begin{array}{l}x - 2 = 2\\x - 2 = - 2\end{array} \right.\)

⇔ \(\left[ \begin{array}{l}x = 4\\x = 0\end{array} \right.\)

Vậy x = 0 hoặc x = 4

 |y – 1| = 9

⇒ \(\left[ \begin{array}{l}y - 1 = 9\\y - 1 = - 9\end{array} \right.\)

⇔ \(\left[ \begin{array}{l}y = 10\\y = - 8\end{array} \right.\)

Vậy y = -8 hoặc y = 10.