<PRE><B>Question 816575</B>
y = -x + 3
y - 2x = 6
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y - 2x = 6
-y = -2x - 6
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y = -x + 3
-y = -2x - 6
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add:
0 = -3x - 3
3x = -3
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x = -1
y = 4
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