What value of * makes the following correct:
Answer: 3.
Checking that 3 works:
3 3 3 3
- - - + - = -
3 2 4 12
1 - 1.5 + 0.75 = 0.25
0.25 = 0.25, which confirms that 3 is correct.
To deduce the answer directly from the question, we can multiply throughout by 12,
* * * *
- - - + - = -
* 2 4 12
to give:
12 - 6* + 3* = 1*
12 - 3* = 1*
12 = 4*
3 = *
As required.
- - - + - = -
3 2 4 12
1 - 1.5 + 0.75 = 0.25
0.25 = 0.25, which confirms that 3 is correct.
To deduce the answer directly from the question, we can multiply throughout by 12,
* * * *
- - - + - = -
* 2 4 12
to give:
12 - 6* + 3* = 1*
12 - 3* = 1*
12 = 4*
3 = *
As required.
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