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Posted by **lomas** on Thursday, October 21, 2010 at 9:19pm.

5 girls moved from Mrs. Changs to Mr. Blackwells.

Now there are twice as many girls in Mr. Blackwells class as there are in Mrs. Changs, How many girls were in Mr. Blackwells class to begin with?

Help, stuck with this problem.

- math -
**Reiny**, Thursday, October 21, 2010 at 9:34pmretype the first sentence, it makes no sense and must contain a typo ....

probably "4 more girls" or "4 less girls"

- math -
**lomas**, Thursday, October 21, 2010 at 9:36pmsorry. it's 4 more girls

- math -
**Reiny**, Thursday, October 21, 2010 at 9:44pmmake a chart:

Now....

Mr Blackwell --- x students

Mrs Chang ---- x+4

after move:

Mr. B ---- x+5

Mrs. C ---- x-1

x+5 = 2(x-1)

x+5 = 2x - 2

x = 7

so Mr B had 7, Mrs C had 11

(Wow! 7 students and 11 students, where do these schools exist ???? I might go back to teaching)

- math -
**lomas**, Thursday, October 21, 2010 at 9:51pmthank you.

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