Question

/x-25/ = 17

Answer 1

/ x - 25 / = 17

Xét x - 25 = 17

x = 17 + 25

x = 42

Xét x - 25 = - 17

x = - 17 + 25

x = 8
Vậy x = 42 

hoặc x = 8

Answer 2

x - 25 = 17 hay x - 25 = -17

x        = 17 + 25 hay x = -17 + 25

x        = 42         hay x = 8

Answer 3

/x - 25/ = 17 \(\Leftrightarrow\hept{\begin{cases}x-25=17\\x-25=-17\end{cases}}\Leftrightarrow\hept{\begin{cases}x=42\\x=8\end{cases}}\)

Vậy \(x\in\left\{42;8\right\}\)