The sum of two numbers i nine. Using x to represent the larger of the two numbers, translate "the difference between one more than the large number and twice the smaller number" into a variable expression. Then simplify.

3x-17

Step-by-step explanation:

x is the larger number. x+1-2y is the equation where y is the smaller number. But x+y=9 or x-9=-y or 2x-18=-2y.

Then the variance expression is x+1+2x-18=3x-17

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