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March 1, 2015

Posted by **David** on Friday, October 21, 2011 at 5:47pm.

- math -
**Ms. Sue**, Friday, October 21, 2011 at 5:51pmSolve for x.

14 + 18.75 + x + 4 = 43

36.75 + x = 43

x = 43 - 36.75

x = ?

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**David**, Friday, October 21, 2011 at 5:56pmWhy do you add the $4? My daughter missed this on a homework sheet because she didn't use the $4. Why should that even be considered?

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**Ms. Sue**, Friday, October 21, 2011 at 6:04pmWe're trying to find out how much she spent for lunch. We can account for the rest of the money.

Another way to work this problem is:

14 + 18.75 + x = 43 - 4

You'll get the same answer.

- math -
**David**, Friday, October 21, 2011 at 6:12pmThanks, but that still makes no sense.

If she SPENT a TOTAL of $43 which included $14 for socks and $18.75 for a wallet and had $4 LEFT, Why does the $4 even have to be in the equation?

$43= $14 + $18.75 + LUNCH (X)

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**Ms. Sue**, Friday, October 21, 2011 at 6:14pmI see your point. The question states that she SPENT $43. I suggest you have your daughter ask her teacher.

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**Reiny**, Friday, October 21, 2011 at 7:45pmThe $4 only enters the picture if asked ,

"how much money did she start with"

it said,

14 + 18.75 + lunch = 43

lunch = 43 - 14 - 18.75 = 10.25

So her lunch cost $10.25

She started with 43+4 or $47

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