1. Get K/9 by itself to do so add 3 to both sides eliminating it on the left by turning the -11 into -8
2. Multiply by 9 on both sides eliminating the division of 9 on the left and turning -8 into -72 leaving the equation as K = -72
To eliminate a number you must do its opposite so the opposite of -3 is +3 so you +3 to both sides. And always start the equation by eliminating what is not connected to the variable in this case the 9 was connected to the variable as K/9.
The 5 and 10 min cross. 10 <span>The 5 min returns. 15 </span> <span>The 20 and 25 min cross 40 </span> <span>The 10 min comes back 50 </span> <span>The 5 and 10 min cross again in60 Mins</span>
