Briefly

Guess the number

Guess the number



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If we subtract 7 from a number and multiply the result by 7, the value obtained would be the same as if that number had been subtracted from 5 and multiplied by 5.

What number are we talking about?

Solution

If x is the number in question, we have to: 7 (x - 7) = 5 (x - 5) and therefore x = 12