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Question 171936: twice the result of subtracting an unknown number from five is eight.find the number
Answer by ptaylor(2198)   (Show Source):
You can put this solution on YOUR website! Let x=the unknown number
when we subtract it from 5, we get:
(5-x); twice (5-x) is:
2(5-x) and we are told that this equals 8, so:
2(5-x)=8 get rid of parens (distributive law)
10-2x=8 subtract 10 from each side
10-10-2x=8-10
-2x=-2 divide each side by -2
x=1-----------------------the unknown number
CK
5-1=4
2*4=8
Hope this helps---ptaylor
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