99:(X9+63)=11 /X/=986-46x3
X9+63=99:11 /X/=986-138
X9+63=9 /X/=848
X9 = 9-63 =>X=848 Hoặc X=-848
X9 =-207
X=-207:9
=>X=-23
tk cho mk nha
99 : (x . 9 + 63) = 11
=> 99 : (9x + 216) = 11
=> 9x + 216 = 99 : 11
=> 9x + 216 = 9
=> 9x = 9 - 216
=> 9x = -207
=> x = -207 : 9
=> x = -23
99 :( 9x + 216) = 11 |x|= 986 - \(46\times3\)
9x +216= 99: 11 |x| = 986- 138
9x + 216 = 9 |x| = 848
9x = 9 -216 \(\Rightarrow\orbr{\begin{cases}\left|x\right|=846\\\left|x\right|=-846\end{cases}}\)
9x = -207 Vậy x= 846 ; x= -846
x = -207 :9
x =-23
Vậy x= -23