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Q&A #9409

Teachers' Lounge Discussion: Solving algebraic equations

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From: Loyd <loydlin@aol.com>
To: Teacher2Teacher Public Discussion
Date: 2005092913:20:51
Subject: Re: basic math

On 2005092816:38:38, maxine robertson wrote:
>	
>Please help with finding and solving: x + 3/8 + 3/8 =5/12
>
>also 3/5 x 13.65 - 2/9 x 1.307
>


Start with this one: x + 3/8 + 3/8 =5/12
The lesast common denominator (LCD) is 8x12 or 96.  Multiply each term
by the LCD and:

96x + 36 + 36 = 40
96x = 40-72
96x = -32
x=-32/96= -1/3

For the other one, multiply first and then subtract.  

3/5 x 13.65 - 2/9 x 1.307

Set up as follows:

3x13.65   -   2 x 1.207
--------     -----------
   5              9

8.19  -  .2682222 repeating

Just subtract the two numbers.

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