Use algebra to justify the results in the following tricks. Show your working. Call the original number that is chosen ‘n’.
Think of a number. Add 21. Double this result. Subtract 2. Double this result again. Add 20. Divide this number by 4. Subtract 25. You have your original number back!
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Answer:
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Answered by
1
Answer:
n=5
Step-by-step explanation:
n=5
=5+21=26*2=52
52-2=50
50*2=100
100+20=120
120/4=30
30-25=5
we got the original no. we thought
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