We need to determine which of the given equations has solution x = 12.
We can do so by replacing x with 12 on the left side of an equation and comparing the result to the right side. If they are equal, then x = 12 will be a solution to that equation.
We have:
[tex]12-12=0\ne4[/tex][tex]48\div12=4\ne12[/tex][tex]12+4=16\ne12[/tex][tex]12(12)=144[/tex]Therefore, x = 12 is a solution to the last equation.
Answer: 12 x = 144
