SOLUTION: add: (r-8s+7)+(3r+7s)+(s+9) the answer is

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Question 423985: add:
(r-8s+7)+(3r+7s)+(s+9)
the answer is

Found 2 solutions by linht117, MathLover1:
Answer by linht117(37) About Me  (Show Source):
Answer by MathLover1(20850) About Me  (Show Source):