a)
5/x=0,20 =>5/x=20/100 ( cate cifre avem dupa virgula) inmultim termenii pe diagonale =>5*100=20x =>500=20x x=500/20=25 =>x=25 b)
x/9=4,2 =>x/9=42/10 10x=42*9 =>10x=378 =>x=378/10=37,8 =>x=37,8
c)11/x=1,4 =>11/x=14/10 =>11*10=X*14 =>110=14x X=110/14=7,14
