If `(xy)/(x+y) = a, (xz)/(x+z) = b and (yz)/(y+z) = c`, where a,b,c are other than zero, find the value of x

Q.if x(y)/(x+y)=a,x(z)/(x+z)=b and y(z)/(y+z)=c, where a ,b and c are other than zero then x equals

If x=c y+b z ,y=a z+c x ,z=x+a y ,w h e r e .x ,y ,z are not all zeros, then find the value of a^2+b^2+c^2+2a b c dot

If x+y -z = 4 and x^(2) + y^(2) + z^(2) = 30 , then find the value of xy- yz- zx

Given a=x/(y-z),b=y/(z-x), and c=z/(x-y), where x,y,z and are not all zero,then the value of ab+bc+ca is 0 b.1 c.-1 none of these

If a^(x)=b^(y)=c^(z) and abc=1 then find the value of xy+yz+zx