Question

Tìm 7 : (a - 1) =

HELP ME! PLEASE

Answer 1

7:(a-1)=\(\dfrac{7}{a}-7\)

Answer 2

\(\dfrac{7}{a-1}\)

Answer 3

\(\Rightarrow a-1\inư\left(7\right)=\left\{1;-1;7;-7\right\}\)

\(\left[{}\begin{matrix}a-1=1\\a-1=-1\\a-1=7\\a-1=-7\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}a=2\\a=0\\a=8\\a=-6\end{matrix}\right.\)