Question

7х+5додати4х+6
1-3х              3х-1

Answer 1

(7x+5)/(1-3x)+(4x+6)/(3x-1)=(7x+5)/(1-3x)_(4x+6)/(1-3x)=(7x+5-4x-6)/(1-3x)=
=(3x-1)/(1-3x)=-1