1) Identify ------> Mrs. Grey's time is the unknown
2) Strategize
Let
x--------> Mrs. Grey's time in minutes
3) set up
we know that
[tex]12*50=x*60[/tex]
4) solve
[tex]12*50=x*60\\ x=(12*50)/60\\x=10\ minutes[/tex]
5) check
[tex]12*50=10*60\\600=600[/tex]
therefore
the answer is
-Identify
-strategize
-set up
-solve
-check