Given parallelogram KLMN below, MO=12. If OK=x−1, solve for x

As it is a parallelogram, we know the following:
Thus, in our case, MO is congruent to OK, meaning that:
[tex]OK=MO[/tex]Substituting the values given:
[tex]x-1=12[/tex]Solving for x:
[tex]x=12+1[/tex]Answer: x = 13