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6r + 7 = 13 + 7r solve for missing variable
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6r + 7 = 13 + 7r solve for missing variable

User Yasin YILDIRIM
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1 Answer

1 vote
6r + 7 = 13 + 7r
7 = 13 + 1r
-6 = 1r
r = -6
User Fitzchak Yitzchaki
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