Question

IN 2 BIDOANE SUNT IN TOTAL 25LITRI DE ULEI .CATI LITRI DE ULEI SUNT IN FIECARE BIDON ,DACA UNUL DINTRE BIDOANE CONTINE CU 7 LITRI MAI MULT?

Answer 1

[tex]a+b=25.l\\ a=b*7 \\b*7+b=25.l\\ 8b=25.l\\ b=3,125.l\\ a=21,875l\\ --------\\ 3,125l+21,875l=25l\\ 3,125l*7=21,875l[/tex]