Answer:
-
Step-by-step explanation:
r+7=3r+9
r=3r+2
-2r=2
r=-1
r+3=3r+9
r=3r+6
-2r=6
r=-3
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Answers & Comments
Answer:
-
Step-by-step explanation:
r+7=3r+9
r=3r+2
-2r=2
r=-1
r+3=3r+9
r=3r+6
-2r=6
r=-3