Tìm x biết 2|x| - 3|x| + 18 = 2x

tim x
2 /x/ - 3/x/ + 18 =2x
13 - /4 - /2-x//= 5
//x +3 / - 9/=5
(x + 1)^2 .(x^2 + 1) =0