Помогите решить
{1/(x+y)=7,5,
{1/y-1/x=8

{1/(x+y)=7,5⇒x+y=2/15⇒x=2/15-y{1/y-1/x=8⇒x-y=8xy2/15-2y=8y(2/15-y)2/15-2y-16y/15+8y²=08y²-46y/15+2/15=0120y²-46y+2=0D=2116-960=1156y1=(46-34)/240=1/20⇒x1=2/15-1/20=(8-3)/60=1/12y2=(46+34)/240=1/3⇒x2=(2/15-1/3=(2-5)/15=-1/5(1/12;1/20);(-1/5;1/3)