Răspuns :
- 7 = 4 x + 1
4 x + 1 = - 7
4 x = - 7 - 1
4 x = - 8
x = ( - 8 ) : 4
x = - 2 ∈ Z
4 x + 1 = - 7
4 x = - 7 - 1
4 x = - 8
x = ( - 8 ) : 4
x = - 2 ∈ Z
[tex]\it -7=4x+1 \Leftrightarrow -7-1=4x \Leftrightarrow -8=4x \Leftrightarrow 4x = -8 \Leftrightarrow x = -2[/tex]