Đáp án đúng:
Giải chi tiết:Cách giải:
\(\begin{array}{l}a)\,\,\left| {x - 1} \right| + \left( { - 3} \right) = 17\\\left| {x - 1} \right| = 17 - \left( { - 3} \right)\\\left| {x - 1} \right| = 17 + 3\\\left| {x - 1} \right| = 20\end{array}\)
Nếu \(x-1=20\Rightarrow x=20+1=21\)
Nếu \(x-1=-20\Rightarrow x=\left( -20 \right)+1=-19\)
Vậy \(x=21\) hoặc \(x=-19\)
\(\begin{array}{l}b)\,\,32 + x = 46 - 84\\32 + x = 46 + \left( { - 84} \right)\\32 + x = - 38\\\,\,\,\,\,\,\,\,\,\,\,x = - 38 - 32\\\,\,\,\,\,\,\,\,\,\,\,x = - 38 + \left( { - 32} \right)\\\,\,\,\,\,\,\,\,\,\,\,x = - 70.\end{array}\)
Vậy \(x=-70\)
