## Answer :

[tex]2v+7=3 \\\\ 2v=3-7 \\\\ 2v=-4 \ \ |:2 \\\\ \boxed{v=-2}[/tex]

[tex]2v+7=3 \\\\ 2v=3-7 \\\\ 2v=-4 \ \ |:2 \\\\ \boxed{v=-2}[/tex]