Answer:
a.15
Step-by-step explanation:
11=6+k/3
subtract 6
11-6=k/3
5=k/3
multiply by 3/1 (basically just opposite of 1/3)
15=k
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15
If you want to check this answer plug in 15 for k .
11= 6+ 15/3
11= 6+5
11=11
