Question

tim x,biet l2xl=x-1/2

Answer 1

Th1 

2x=x-1/2

2x-x=1/2

x=1/2

th2

-2x=x-1/2

-2x-x=1/2

-3x=1/2

x=1/2:-3

x=-1/6

tớ nghĩ vậy

Answer 2

th1:

2x=x-\(\frac{1}{2}\)

x-2x=\(\frac{1}{2}\)

-x=\(\frac{1}{2}\)

x=\(\frac{-1}{2}\)

th2:

-2x=x-\(\frac{1}{2}\)

3x=\(\frac{1}{2}\)

x=\(\frac{1}{6}\)

nho **** mk nhe