Posted by aria on Thursday, June 9, 2011 at 5:11pm.
I need help with these two problems. I need to have all of the steps shown for full credit and I get lost along the way.
6x  2y = 10
4x + 3y = 12
solve the system by elimination.
solve inequality
2(2x6)4x>or equal to 3x10 + 9
It's at this point in our lessons I keep losing my previous knowledge. I think I need time to let the previous knowledge sink in before moving on. However, that isn't acceptable.
Thanks for your help.

Algebra  PsyDAG, Friday, June 10, 2011 at 3:46pm
Multiply the top equation by 3 and the bottom equation by 2. Then add the two equations. This will elimination the y term.
2(2x6)4x ≥ 3x10 + 9
4x+124x ≥ 3x10 + 9
Combine like terms. It works just like an equation, except that multiplying/dividing by a negative value reverses the carat (e.g., > ot <).
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