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determina x din propozitia 4x-5/7x+6=3/20,x € R- {-6/7}

Răspuns :

4x-5/7x+6=3/20》(4x-5)×20=(7x+6)×3
》80x-100=21x+18》80x-21x=18+100
》59x=118》x =2