3,4/5,1 = 1,4/x pleeeeeeeeeeeas

[latex] frac{3,4}{5,1} = frac{1,4}{x} [/latex][latex] frac{2}{3} = frac{1,4}{x} [/latex][latex]2*x=3*1.4[/latex][latex]x= frac{3*1.4}{2} =3*0.7=2.1[/latex]

3.4/5.1=1.4/x3.4=3 4/10=3 2/5=17/55.1=5 1/10=51/101.4=1 4/10=1 2/5=7/57/5x=17/5:51/107.5x=17/5×10/517/5x=2/3x=2/3:7/5x=2/3×5/7x=10/21