10ах=13by-7*(x-y)-10ay-13bx
13by-7(x-y)-10ay-13bx-10ax=0
13b*(y-x)-7*(x-y)-10a*(x-y)=0
-13b*(x-y)-7*(x-y)-10a*(x-y)=0
(x-y)*(-13b-7-10a)=0
(x-y)*(13b+10a+7)=0
10ax=13by-7(x-y)-10ay-13bx
13b(y-x)-7(x-y)-10a(y-x)=0
(13b-10a)(y-x)-7(x-y)=0
-(13b-10a)(x-y)-7(x-y)=0
-(x-y)(13b-10a-7)=0
(x-y)(13b-10a-7)=0
10ах=13by-7*(x-y)-10ay-13bx
13by-7(x-y)-10ay-13bx-10ax=0
13b*(y-x)-7*(x-y)-10a*(x-y)=0
-13b*(x-y)-7*(x-y)-10a*(x-y)=0
(x-y)*(-13b-7-10a)=0
(x-y)*(13b+10a+7)=0
10ax=13by-7(x-y)-10ay-13bx
13by-7(x-y)-10ay-13bx-10ax=0
13b(y-x)-7(x-y)-10a(y-x)=0
(13b-10a)(y-x)-7(x-y)=0
-(13b-10a)(x-y)-7(x-y)=0
-(x-y)(13b-10a-7)=0
(x-y)(13b-10a-7)=0