Help me, help my ni...
 

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[Closed] Help me, help my niece with Maths homework

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This is doing my head in and until I get it solved I can't go out for a ride.

Apparently the answer to the following equation is 0.04, but how?

0.1d = 2.5(1+d)x -0.1


 
Posted : 26/06/2011 1:06 pm
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Is that an x or a multiply?


 
Posted : 26/06/2011 1:07 pm
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is that a letter x or a multiplication sign?


 
Posted : 26/06/2011 1:08 pm
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assuming it's an x, they cancel out and i got d=-1...


 
Posted : 26/06/2011 1:14 pm
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Oops sorry it is a letter X and I'm trying to solve for X


 
Posted : 26/06/2011 1:19 pm
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If multiplication..

Cancel out the 0.1

d = -2.5(1+d)
d = -2.5 -2.5d
3.5d = -2.5
d = -2.5/3.5 = -0.714285714...

If x..

0.1d = 2.5(1+d)x -0.1
(0.1d + 0.1)/(1 + d) = 2.5x
0.1(1 + d)/(1 + d) = 2.5x
0.1/2.5 = x = 0.04

Don't think of me as a hero.


 
Posted : 26/06/2011 1:21 pm
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I concur.


 
Posted : 26/06/2011 1:23 pm
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yes I agree with[s]boy[/s] realman maths student as well just wish I knew what any of it meant


 
Posted : 26/06/2011 1:25 pm
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d is a variable in this, x is a constant - possibly why it's throwing people off, it's a little odd.


 
Posted : 26/06/2011 1:28 pm
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no honestly it is my maths ability despite an A in O level in 1986 I am poor at "proper" maths forgotten almost everything.


 
Posted : 26/06/2011 1:31 pm
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Me too. 😳


 
Posted : 26/06/2011 1:31 pm
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Oh thank god for that. Realman you are my hero (and Sophie's)

That's it I'm off out to enjoy this sun

Thanks again fella!


 
Posted : 26/06/2011 1:53 pm

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