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Substitution method- r = -3s r= 10 - 4s
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4 votes
Substitution method-
r = -3s
r= 10 - 4s

User Anderson Fortaleza
by
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1 Answer

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r=-3s\\r=10-4s\\\\-3s=10-4s\ \ \ \ |add\ 4s\\-3s+4s=10\\s=10\\\\r=-3\cdot10=-30
User Aparpara
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