Question 100249
Let x=first number
x+1=second number
x+2=third number

(1)  twice the second number=2(x+1)
(2)  17 more than the third=(x+2)+17 or x+19

and we are told that (1)=(2)

2(x+1)=x+19  get rid of parens

2x+2=x+19  subtract 2 and also x from both sides

2x+2-2-x=x-x+19-2  collect like terms

x=17---------------------first number
x+1=17+1=18--------------second number
x+2=17+2=19---------------third number


CK
twice the second is 17 more than the third

2*18=19+17
36=36



Hope this helps---ptaylor