SOLUTION: Tom is walking 12 miles from A to B. He already walked x miles. He needs to walk y miles more.

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Question 1175435: Tom is walking 12 miles from A to B.
He already walked x miles.
He needs to walk y miles more.
Found 3 solutions by Boreal, ikleyn, ewatrrr:
Answer by Boreal(15235)   (Show Source): You can put this solution on YOUR website!
Not clear what you want.
x+y=12
he has 12-x miles to walk
y=12-x with units miles
Answer by ikleyn(52803)   (Show Source): You can put this solution on YOUR website!
.

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Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi
12mi from A to B
walked 'x' miles
remaining is 'y' miles
 y = 12-x
and 
x + 12-x = 12
For ex: IF x = 5mi ⇒ y = 12-x = 7
Using the variable like x and y helps one solve problems!
Wish You the Best in your Studies.


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