To find the value of k, we need to isolate it on one side of the equation.
We can start by moving the -11 to the right side by adding 11 to both sides:
-20 + 11 = k/2
Simplifying on the left side gives us:
-9 = k/2
To get rid of the fraction, we can multiply both sides by 2:
-9 * 2 = k/2 * 2
Simplifying gives us:
-18 = k
-20 = -11 + k/2
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