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March 31, 2015

March 31, 2015

Posted by **Jenny** on Friday, April 29, 2011 at 4:37pm.

- Algebra -
**Damon**, Friday, April 29, 2011 at 5:13pmbox 1

x kg

.2x copper

.8 x whatever

box 2

y kg

.4 y copper

.6 y whatever

box 3

x+y kg = 500

.25*500 = 125 kg copper

375 kg whatever

so

125 = .2 x + .4 y

500 = x + y

take it from there

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