Lara's sequence

Lara starts with a number less than 20. She divides it by 2 and adds 6. She then divides this result by 3. Her answer is 4.5. What number does she start with?

Correct answer:

x =  15

Step-by-step explanation:

x2/3=4.5 x2=3 4.5=13.5  x/2+6 = x2 x/2 = x26 x=2 (x26)=2 (13.56)=15   Verifying Solution:  X1=x/2+6=15/2+6=227=1321=13.5 X2=X1/3=13.5/3=29=421=4.5



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