Question

Mong mọi người giúp đỡ  

Answer 1

a: \(\Leftrightarrow\left\{{}\begin{matrix}x-1\in\left\{-1;1;2;4;8\right\}\\x+3\in\left\{3;4;6;12\right\}\end{matrix}\right.\Leftrightarrow x\in\left\{0;3\right\}\)