Question

tìm x biết :

3 x-\(\dfrac{1}{2}\) x=13

Answer 1

`5/2 x = 13`

`x = 13 : 5/2`

`x = 26/5`

Answer 2

\(\left(3-\dfrac{1}{2}\right)x=13\\ \left(\dfrac{6-1}{2}\right)x=13\\ \dfrac{5}{2}x=13\\ x=13:\dfrac{5}{2}\\ x=\dfrac{26}{5}\)

Answer 3

Answer 4

3 x-\(\dfrac{1}{2}\) x=13 \(\leftrightarrow\) \(\dfrac{5}{2}\)x=13 \(\leftrightarrow\) x=13: \(\dfrac{5}{2}\)\(\leftrightarrow\) x=\(\dfrac{26}{5}\)