Homework Help: Algebra

Posted by Willow on Monday, February 23, 2009 at 3:54pm.

The perimiter of a lot is 190 meters. The width is one-fourth of the length. Find the dimensions.

Here's my system of equations:

2w + 2L = 190
1/4L = w

What would I do from here? I prefer the elimination method. Would I multiply the second equation by 4? When I did so, it kind of messed up the equation.

Thanks! :)

Algebra - Reiny, Monday, February 23, 2009 at 4:06pm
I would use substitution, but if you insist on using elimination, multiplying the second equation by 4 gives you
L = 4W or 4W - L = 0
now double that:
8W - 2L = 0 , now the first:
2W + 2L = 190, now add them
.
.
.

I'm sure you can finish it.
Thank you! - Willow, Monday, February 23, 2009 at 4:09pm
Did you get w = 19 and L = 76?

Thanks! :)
Algebra - Reiny, Monday, February 23, 2009 at 4:32pm
yes, correct!

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