[tex]\left \{ {{x+y=371 }\atop{\frac{x}{y} =\frac{6}{100}}} \right. \\\\\left \{ {{x=371-y} \atop {\frac{371-y}{y} =\frac{6}{100}}} \right. \\\\\left \{ {{x=371-y} \atop {100(371-y)=6y}} \right. \\\\\left \{ {{x=371-y} \atop 37100-100y=6y}} \right. \\\\\left \{ {{x=371-y} \atop 37100=106y /:106}} \right. \\\\\left \{ {{x=371-y} \atop 350=y}} \right. \\\\\left \{ {{x=371-350} \atop 350=y}} \right.\\\\\left \{ {{x=21} \atop y=350}} \right.[/tex]
