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OpenStudy (anonymous):
3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y. A. 20 B. 18 C. 11 D. 10 E. 5
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OpenStudy (cwrw238):
adding both equations gives 4x + 4y = 20 so divide both sides by 2 and you've got it
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