Answer:
[tex]x=\frac{3}{2}[/tex]
Step-by-step explanation:
[tex]2x-12/-3=7.\\\\2x-\frac{12}{-3}=7\\\\\frac{12}{-3}=-4\\\\2x-\left(-4\right)=7\\\\\mathrm{Apply\:rule}\:-\left(-a\right)=a\\\\2x+4=7\\\\\mathrm{Subtract\:}4\mathrm{\:from\:both\:sides}\\\\2x+4-4=7-4\\\\Simplify\\\\2x=3\\\\\mathrm{Divide\:both\:sides\:by\:}2\\\\\frac{2x}{2}=\frac{3}{2}\\\\Simplify\\\\x=\frac{3}{2}[/tex]