w+3=w+6 obviously doesn't equal itself... subtract w from both sides and you are left with 3=6 So the answer is NO SOLUTION, or as a set, it is the empty or null set.
Given T = R + RSLateral inversion makes it to be R + RS = TTaking R as common factor, we get R(1+S) = TNow dividing by (1+S) both sides, R = T / (1+S)Hence the solution R = T/(1+S)