What is the mystery
number? If I subtract 1 / 2 of it, then multiply by 3, and then add 2, the
end result is 26.
It seems that this will have me
hunt for a number that can solve an equation, as listed above.
Solve/Investigate the Problem
I will set up an equation to
solve, and put in numbers until it solves correctly.
of the Problem
At first, I tried this
(x – X/2) times 3 + 2 =
Then I picked the number 6 and
plugged it in. (6 – 6/2)
times 3 + 2 = 26
(6-3) 3 +2 = 26
18 * 3 + 2 = 26
54 + 2 not equal to 26
I tried several more numbers, then realized I had read the question incorrectly. The correct equation should be:
((x/2) *3) + 2 = 26 This is
because any number minus it’s half is the same as that number divided
I began plugging numbers in for
x . ((8/2)
* 3) + 2 = 26;
(4 * 3) + 2 = 26; 12 + 2 is not equal to 26. I realized that I could combine the
2 and the 26 on opposite sides of the equation, and then solve (x/2) * 3 = 24. Then I realized I could solve x/2 to
be equal to 8, because 8 * 3 = 24.
Therefore, “16” is the answer.
Extensions of the Problem
I could come up with my own
mystery number, using 3 different operations. I might try that some time.
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