Answer:
x = 38
Explanation:
First step is to subtract 12 from both sides:
[tex]31=12+\frac{1}{2}x[/tex][tex]31-12=12+\frac{1}{2}x-12[/tex][tex]31-12=\frac{1}{2}x[/tex][tex]19=\frac{1}{2}x[/tex]Finally, multiplying both sides by 2 gives
[tex]2\cdot19=\frac{1}{2}x\cdot2[/tex][tex]38=x[/tex]Hence, the value of x is 38.
