Question

Tìm x biết:

1,  3x+2/5x+7=3x-1/5x+1

2,   x+1/2x+1=0.5x+2/x+3

Answer 1

1,3x+2/5x+7 =3x-1/5x+1

<=> 1,3x+2/5x-3x+1/5x = 1-7

<=> (1,3+2/5-3+1/5)x = -6

<=> -11/10x=-6

<=> x= -6 : (-11/10)

<=> x= 60/11

 

2.x+1/2x+1 = 0,5x+2/x +3

<=> 2x+1/2x-0,5x-2/1x = 3-1

<=> x(2+1/2-0,5-2 ) =2

<=>0x =2

<=> x=0 

Answer 2

Hinh nhu minh thay ban Kunzy Nguyen giai hoi sai

1,3x o dau ra ???????????????

Answer 3

 Hình như bạn Kunzy Nguyễn ghi nhầm 3x thành 1,3x nhỉ ?!!!