SOLUTION: 4. (6r + 2s -1) - (4r - 7s + 1)

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Question 171343: 4. (6r + 2s -1) - (4r - 7s + 1)
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
(6r+2s-1)-(4r-7s+1)
6r+2s-1-4r+7s-1
2r+9s-2 ans.