Автор - Meowmeowgav

5×(7×r-5)=225 срочно помогите решить !!!

Ответ

Автор - aliyas1

5×(7×r-5)=225 \ (7×r-5)=225 div 5 \ 7×r-5=45 \ 7×r = 45 + 5 \ 7×r  = 50 \ r  =  frac{50}{7}  \ r = 7 frac{1}{7}

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