Question

Tìm x

a) |x|=|=|-

d)|2x+1|=x+1

e)|2x+1|+|4x+2|+|6x+5|=5

f)|x|≤ 3 (x∈Z)

h) |x+| + | x+

Answer 1

x = 0

Answer 2

|x|=1

=>x=1 hoặc -1