Question

Tìm x, biết :

x-1/27=-3/1-x

Answer 1

các bạn giúp mình với

Answer 2

Bó tay

Answer 3

\(\frac{x-1}{27}=-\frac{3}{1-x}\)

\(\left(x-1\right)\left(1-x\right)=-27.3\)

\(\Rightarrow\orbr{\begin{cases}x=-8\\x=10\end{cases}}\)

Answer 4

X = -8

X = 10

Answer 5

Anh dũng ơi k mình đi

Answer 6

\(\frac{x-1}{27}=\frac{-3}{1-x}\)

\(\Rightarrow\left(x-1\right).\left(1-x\right)=\left(-3\right).27\)

\(\left(x-1\right)\left(1-x\right)=-81\)

\(\Leftrightarrow x-x^2-1+x=-81\)

\(x-x^2+x=-80\)

\(\Leftrightarrow2x-x^2=-80\)

\(x\left(2-x\right)=-80\)

\(\Rightarrow\orbr{\begin{cases}x=10\\x=-8\end{cases}}\)