Marcel has a number trick where he asks the audience to "think of a number."
He calls this number x - Junior Cycle Mathematics - Question a - 2015
Question a
Marcel has a number trick where he asks the audience to "think of a number."
He calls this number x.
Marcel gives the audience the instructions in the table bel... show full transcript
Worked Solution & Example Answer:Marcel has a number trick where he asks the audience to "think of a number."
He calls this number x - Junior Cycle Mathematics - Question a - 2015
Step 1
Think of a number.
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Answer
The result is simply the number you chose, let this number be represented by x.
Step 2
Multiply the number by 3.
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Now, multiplying x by 3 will result in 3x.
Step 3
Add 2 to your answer.
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Answer
Adding 2 to 3x gives us 3x+2.
Step 4
Subtract your original number (i.e. x).
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When you subtract your original number x from 3x+2, we get 2x+2.
Step 5
Divide your answer by 2.
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Dividing 2x+2 by 2 yields x+1.
Step 6
Subtract your original number.
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Finally, subtracting the original number x from 1 results in 1.
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