can somone help me with this one 2x-4y=20
4x+2y=-20
What are you trying to do? Find the values of x and y? If so, solve for x in the first one, and then substitute that value into the second equation. This will give you y. From here, just substitute the y into either one of the original two equations to get x.
You were shown in detail how to do questions like this one at one of your earlier posts: http://www.mathhelpforum.com/math-he...se-165842.html
Please try to learn something from the help you get given.
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