tìm x `2/5 x + 2/3 = -1/5 x – 1/3`

2 bình luận về “tìm x `2/5 x + 2/3 = -1/5 x – 1/3`”

1. 2/5x+2/3=1/5x-1/3

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

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

   <=>3/5x          =-1

   <=>     x          =-1:3/5

   <=>     x          =-5/3

   Vậy x=-5/3

   Trả lời
2. $\frac{2}{5}x+$ $\frac{2}{3}=$ $-\frac{1}{5}x$ $-\frac{1}{3}$

   ⇔$\frac{2}{5}x+$ $\frac{1}{5}x=$$-\frac{2}{3}-$ $\frac{1}{3}$

    

   ⇔$\frac{3}{5}x=-1$ 

   ⇒$x=$$-\frac{5}{3}$ 

   Trả lời