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Solve using the elimination method. Show your work.

0 votes
x + 8y = 14

 -3x + 4y = 0
asked Mar 5, 2013 in PRE-ALGEBRA by rockstar Apprentice

1 Answer

0 votes
Eliminate variable x by multiply the equation 1 by 3 and add the equation to 2.

3x + 24y = 42
-3x + 4y = 0
----------------------
28y = 42

divide each side by 28
y = 42/28 = 1.5

substitute y = 1.5 in equation 1
x + 8 * 1.5 = 14
x + 12 = 14

subtract 12 from each side
x = 2

(x, y) = (2, 1.5)
answered Mar 6, 2013 by Johncena Apprentice

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