Question

-x-1/3=3/4 . Cách làm bài này ntn v m.n

​

Answer 1

\(\frac{-x-1}{3}=\frac{3}{4}\)

\(\Leftrightarrow4\left(-x-1\right)=3\cdot3\)

\(\Leftrightarrow-4x-4=9\)

\(\Leftrightarrow-4x=13\)

\(\Leftrightarrow x=\frac{-13}{4}\)

Answer 2

\(\frac{-x-1}{3}\)=\(\frac{3}{4}\)

⇔\(\frac{\left(-x-1\right).4}{3.4}\)=\(\frac{3.3}{4.3}\)

➜\(-4x-4=9\)

⇔ \(-4x=9+4\)

⇔ \(-4x=13\)

⇔ \(x=\frac{-13}{4}\)

Answer 3

\(\frac{-x-1}{3}=\frac{3}{4}\)

=> (-x - 1).4 = 3.3

=> -4x - 4 = 9

=> -4x = 9 + 4

=> -4x = 13

=> x = \(-\frac{13}{4}\)

Vậy x = \(-\frac{13}{4}\).

Chúc bạn học tốt!