Question

Tìm x

|3x-2|+5x=4x-10

Answer 1

I3x-2I + 5x=4x-10

I3x -2I + 5x - 4x=10

I3x-2I + x=10

I3x-2I=10-x

=>*3x-2=10-x<=>3x+x= 10+2<=>4x=12=>x=3

=>*3x-2=-10+x<=> 3x-x=-10+2<=>2x=-8=>x=-4

Vậy x=3 hoặc x=-4

 

Answer 2

|3x-2|+5x=4x-10

|3x-2|+5x-4x=-10

|3x-2|+x=-10

|3x-2|=-10-x

vi |3x-2| luon lon hon hoac bang 0 ma -10-x be hon 0 (trai voi de bai)