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January 29, 2015

January 29, 2015

Posted by **joey** on Thursday, August 27, 2009 at 10:19pm.

- 6th grade math -
**Ms. Sue**, Thursday, August 27, 2009 at 10:25pm1 - 3/4 = 1/4

1/4 = 6 pieces

4 * 6 = 24

Let's see if that works --

6 + 12 + 6 = 24

Yep, it works!

- 6th grade math -
**Reiny**, Thursday, August 27, 2009 at 10:34pmlet the number of pieces be x

(1/4)x + (1/2)(1 - (1/4)x) + 6 = x

x/4 + 3x/8 + 6 = x

multiply by 8

2x + 3x + 48 = 8x

x = 16

check

they eat 1/4 of 16, leaving 12

then they eat 1/2 of that , leaving 6

Ms Sue had 24.

eating 1/4 of that leaves 18

eating 1/2 of that would leave 9, not 6

- 6th grade math -
**DrBob222**, Thursday, August 27, 2009 at 10:37pmHere is another way to do it.

Let x = number of pieces.

Then x-(1/4)x -(1/2)*(3/4)x = 6

x-(1/4)x-(3/8)x = 6

multiply through by 8 to clear the fractions.

8x-2x-3x=48

3x = 48

x = 16 pieces.

CHECK:

(1/4)*16 = 4 were eaten by person #1.

That leaves 16-4 = 12 pieces.

The second person ate 1/2 of that or (1/2)*12 = 6

So the first person ate 4, the second person ate 6 which makes a total of 10 and that leaves 6 pieces if there were 16 initially.

- 6th grade math -
**Ms. Sue**, Thursday, August 27, 2009 at 10:38pmOops -- thanks, Reiny.

I didn't read very carefully. I missed the part about eating 1/2 of the REMAINING pieces.

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