Let's call the number "x".
According to the problem, the difference of the number and 7 is x - 7.
Then, four times the difference is 4(x - 7), which is equal to 12.
So, we can write the equation as: 4(x - 7) = 12.
Simplifying the equation, we have: 4x - 28 = 12.
Adding 28 to both sides of the equation, we get: 4x = 40.
Finally, dividing both sides by 4, we find that the number is x = 10.
four times the difference of a number and 7 is 12
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