Question

4+|3x+1|=8
si rezolvarea va rog
(dau coroană)​

Answer 1

putem pune |3x+1|+4=8/-4

|3x+1|=4

3x=4-1

3x=3

x=3/3

x=1

Answer 2

$\it 4+|3x+1|=8|_{-4}\Rightarrow |3x+1|=4 \Rightarrow 3x+1=\pm4 \Rightarrow \\ \\ \Rightarrow 3x+1\in\{-4,\ \ 4\}|_{-1} \Rightarrow 3x\in\{-5,\ 3\}|_{:3} \Rightarrow x\in\Big\{-\dfrac{5}{3},\ \ 1\Big\}$