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how do you solve this?
2x + 6y = 66
8x - y = 39
 Feb 15, 2012
 #1
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2x + 6y = 66
8x - y = 39

x = (66 -6y) / 2
8x - y = 39

x = 6 * (11 - y) / 2
8x - y = 39

x = 3 * (11 - y)
8x - y = 39

x = 3 * (11 - y)
8*(3 * (11 - y)) - y = 39

x = 3 * (11 - y)
264 - 24y - y = 39

x = 3 * (11 - y)
- 25y = 39 - 264

x = 3 * (11 - y)
- 25y = -225

x = 3 * (11 - y)
y = 9

y = 9
x = 3 * (11 -9) =6
 Feb 15, 2012
 #2
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[input]solve( 2x + 6y = 66, 8x - y = 39 )[/input]
 Feb 15, 2012

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