Question 1061477
Let x = the number


   2(x+3)   is  "twice the sum of a number and three"
      x-1     is "1 subtracted from the number"

Expanding 2(x+3) and setting the two equal to each other:
 2x+6 = x-1
       x = -7
 
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Ans:  x = -7
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Check:  
          2(-7+3) = 2(-4) = -8
                           -7-1 = -8   (ok)