The table gives information about the costs of hiring bikes． （b）The cost，$$\(M\)$$ ，of hiring a mountain bike for $$\(d\)$$ days can be written as $$\(\quad M=35 d+5\)$$ ． （ii）The cost of hiring an electric bike for 6 days is the same as the cost of hiring a mountain bike for $$\(d\)$$ days． Find the value of $$\(d\)$$ ． d = .............................................

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