Question

Tìm x , biết : 

x - 2 / 2x = 4/7

Answer 1

TÔI CHỊU 

Answer 2

\(\dfrac{x-2}{2x}=\dfrac{4}{7}\) ĐKXĐ: x \(\ne\) 0

<=> \(\dfrac{7\left(x-2\right)}{14x}=\dfrac{8x}{14x}\)

<=> 7(x - 2) = 8x

<=> 7x - 14 = 8x

<=> -14 = 8x - 7x

<=> x = -14