a\ -16 + 23 + x = -16 b\ 3x + 17 = 12 c\ |x- 1| = 2 18/10/2021 Bởi Eden a\ -16 + 23 + x = -16 b\ 3x + 17 = 12 c\ |x- 1| = 2
Đáp án: \(a) -16 + 23 + x = -16\\\Rightarrow x=-16+16-23\\\Rightarrow x=-23\\b) 3x + 17 = 12\\\Rightarrow3x=12-17\\\Rightarrow 3x=-5\\\Rightarrow x=-\dfrac{5}{3}\\c) |x- 1| = 2\\\Rightarrow\left[ \begin{array}{l}x-1=2\\x-1=-2\end{array} \right.\\\Rightarrow\left[ \begin{array}{l}x=2+1\\x=-2+1\end{array} \right.\\\Rightarrow\left[ \begin{array}{l}x=3\\x=-1\end{array} \right.\) Bình luận
Đáp án:
Giải thích các bước giải:
Đáp án:
\(a) -16 + 23 + x = -16\\\Rightarrow x=-16+16-23\\\Rightarrow x=-23\\b) 3x + 17 = 12\\\Rightarrow3x=12-17\\\Rightarrow 3x=-5\\\Rightarrow x=-\dfrac{5}{3}\\c) |x- 1| = 2\\\Rightarrow\left[ \begin{array}{l}x-1=2\\x-1=-2\end{array} \right.\\\Rightarrow\left[ \begin{array}{l}x=2+1\\x=-2+1\end{array} \right.\\\Rightarrow\left[ \begin{array}{l}x=3\\x=-1\end{array} \right.\)