after every ninth visit going to a restaurant you receive a free beverage. After every twelfth visit you recieve a free appetize
2 answers:
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Answer:
10 units
Step-by-step explanation:
We are given that
BD=x+29
AD=x+39
AC=20
BC=x+19
AC=AB+BC
20=AB+x+19
AB=20-x-19=1-x
AD=AB+BD
Substitute the value of x=-9
Then , we get BC= units
Answer: BC=10 units
