Question

tìm x biết \(\dfrac{3}{x}=\dfrac{-6}{15}\)

Answer 1

Từ \(\dfrac{3}{x}=\dfrac{-6}{15}\Leftrightarrow-6.x=3.15\)

\(\Leftrightarrow-6.x=45\Rightarrow x=-\dfrac{45}{6}\)

Answer 2

3.15=-6.x

=> -6x=45

=> x=-45/6=-9/2

Answer 3

ta có: x.(-6) = 3.15

=> x. (-6) = 45

=> x = -45/6

Answer 4

từ 3/x = -6/15 ta có:

3.15 = -6.x

45 = -6.x

45 : ( -6) = x

45/-6 = x

Vậy x = 45/-6 hay -45/6