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Answer:
D. 15 yrs old
Step-by-step explanation:
n×3+6=50 this is the number sentence so, to find what's the meaning of n we have to solve that number sentence the opposite way
50-6÷3=n this is the opposite way now it is time to solve
50
- 6
____
44
44÷3=14.6
then round the decimal to simplest form
and it is 15