Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#2 Re: Help Me ! » very easy problem solving, but I'm just soooooooo bad at this » 2005-09-14 23:16:49

How about this one?
= {m - [1/3m -4] - [m/6 -2]  /2} -2
The result is given: m/4+1
= {m - [1/3m -4] - [m/6 -2]  /2} -2
= {       2/3m +4  - [m/6 -2]  /2} -2
= {       2/3m +4  - [m/6 -12/6]  /2} -2
=         2/6m +2  - [m/12 +12/12]   -2
=         4/12m +2  - m/12 +1   -2
=         m/4 +1

Was that right? (I always get some sign changes wrong..)

#3 Re: Help Me ! » very easy problem solving, but I'm just soooooooo bad at this » 2005-09-14 21:24:06

just a little question here,
you wrote:
= {[2m+12]/12} - 3

= {[2m+12]-36}/12

= {2m - 24}/12

= m/6 - 2

Would the following be correct also?
= {[2m+12]/12} - 3

=  [2m/12] +1-3

= m/6 - 2

?

#4 Re: Help Me ! » very easy problem solving, but I'm just soooooooo bad at this » 2005-09-14 21:00:45

Thanks big_smile  I think I got it, but I must work on my algebra. m-1/3m = 2/3m is so obvious but my brain refuses to see it.. aaah my head!

#5 Help Me ! » very easy problem solving, but I'm just soooooooo bad at this » 2005-09-14 19:51:54

altar
Replies: 10

I decided to get back into learning how to solve these little problems that used to drive me mad when I was a kid. I found a website that explains problem solving by using an example BUT there's a fraction simplification I just don't understand.
The part I don't understand is the simplification of:
by_Faizah=m-(1/3m-4)/4-3  into m/6-2   If someone could explain that to me I'd be most grateful.
(I had to copy the entire image so sorry it's very long..)
mints1.GIF

Board footer

Powered by FluxBB