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OpenStudy (anonymous):
Solve x + 3y = 9 3x – 3y = –13
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jimthompson5910 (jim_thompson5910):
Hint: Add the two equations to get x + 3y = 9 3x – 3y = –13 ------------- 4x + 0y = -4 So 4x = -4 x = ??
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