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


Răspuns :

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

|3x+1|=4

3x=4-1

3x=3

x=3/3

x=1

[tex]\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\}[/tex]