Homework Help: Algebra

Posted by Kim on Thursday, March 11, 2010 at 12:04am.

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
1/5x -1/4 y = 3
2/5x + 1/2y = 2

Algebra - Reiny, Thursday, March 11, 2010 at 12:14am
first one times 20
4x - 5y = 60
second one times 10
4x + 5y = 20
add them
8x = 80
x = 10

in 4x + 5y = 20
if x = 10, y = -4

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