Tracey M. answered • 08/04/18

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Here's an example but I don't know that's its "real world". Another tutor might have a better one.

A very small container of antifreeze (maybe and ounce) is moved into a hot room. The temperature of the antifreeze rises 1/2 degree every minute that goes by. If the starting temperature of the antifreeze is -2°, after how many minutes will the temperature by 8°?

the 1/2 represents the rise in temperature

the -2 represents the starting temperature

solving for x:

1/2x - 2 = 8

1/2x = 10

x = 20

After 20 minutes, the temperature of the antifreeze will be 8°

Here's another example:

4 years ago when Mary was 8, she was one half the age of her brother.

How old is her brother now?

x = brother's age

1/2(x - 4) = 8

1/2x - 2 = 8

this would be the 2nd step in solving this problem and gives you that equation but I think the first example is a better scenario

1/2x = 10

x = 20

The brother is 20 years old now.