Multumesc anticipat!!

[tex]f:\mathbb{R}\rightarrow\mathbb{R} \: \: \: ,f(x)=2x-3[/tex]
[tex]A(x,-5)\:\in\:G_{f} = > f(x) = - 5[/tex]
[tex]2x - 3 = - 5[/tex]
[tex]2x = - 5 + 3[/tex]
[tex]2x = - 2 \: | \div 2[/tex]
[tex]x = - 1[/tex]
[tex]=>A(-1,-5)[/tex]