3-2x
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3 less than twice n is 2n-3
The number is 7.
Let the unknown number be x and so the expression is: 2x-3
Let the number be x and so if 2x-3 = 13 then the value of x works out as 8
I'm not clear on what you're asking here, but if you want that written as an equation, it is: 2x - 3