Question

Tim x

|x+1|+|x+2|+...+|x+10|=7x

Answer 1

Tim x do giup minh voi

Answer 2

|x+1|+|x+2|+....+|x+10|=7x

= | 10x | + (1+2+3....+10)=7x

=> | 10x | + 55 =7x 

=> 55 = -3x

=> x= 55 : (-3)=-18,333..

hình như đề sai 

Answer 3

Vì |x+1| ≥ 0; |x+2|≥0 ;...; |x+10| ≥ 0 => |x+1|+|x+2|+...+|x+10| ≥ 0 => 7x ≥ 0 => x ≥ 0

=>x+1+x+2+...+x+10=7x

=>10x+55 = 7x

=>10x-7x=-55

=>3x=-55

=>x=-55/3