2x ???
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If the number is represented by variable x, then twice the number is represented by 2x.
Let x be the number you are looking for. Since -14 is twice x we write -14 equals twice x or in symbols.-14=2xx=-14/7 or -2So the answer is -2
lets presume the number is X: 2(x+x)+2
x=-3 or x=5
x+2x=303x=30 x=10