Answer:
x=18
Step-by-step explanation:
the result of 12 added to the difference of half a number and 3 is 45.
that looks something like this
[tex]12+\frac{1}{2}x= 45[/tex]
which can be solved as such
[tex]\frac{1}{1} x+(12-3)=45\\\frac{1}{2}x+9=45\\\frac{1}{2}x=45-9\\ \frac{1}{2}x=36\\\frac{2}{1}*\frac{1}{2}x=36*\frac{2}{1} \\ x=36*2\\x=72[/tex]
