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Mathematics, 25.04.2021 06:40 wqijviquyuivqwy9672

Can someone please help me for 4a. i know that answer and the answer is 15d+20 but what is the answer for the second part which is 4b.??

Can someone please help me for 4a. i know that answer and the answer is 15d+20 but what is the answ

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Can someone please help me for 4a. i know that answer and the answer is 15d+20 but what is the answe...

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