Question

Tìm x biết |x-1|=10

Answer 1

x - 1=  10                                  ( HOĂC )                 |x-1| = 10                             

x       = 10 + 1                                                           x-1 = -10

x       = 11                                                                 x    = -10 + 1

                                                                                 x    = -9

Answer 2

|x-1|=10

=> x-1=10

hoac x-1=-10

=> x=10+1

hoac x=-10+1

=> x=11

hoac x=-9

Vay x=11 hoac x=-9