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Twice the difference of a number and 7 is 9
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Twice the difference of a number and 7 is 9

User Joberror
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So you know 2(x-7)=9 so solve for x 9/2=x-7 add 7 and x=23/2
(or 11 and 1/2 if you change to whole numbers)
User Ethan Holshouser
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