Solve the system of linear inequalities with parameters
Here x,y are unknown variables and a,b are parameters.
My attempt. By adding the inequalities with some coeficients I separated the variables and get the simple system
and I am able to solve it. But the solutions of the last system are not solution of the initial system!
Maple and wolframAlpha cant solve the system.
P.S.1 For and Maple gives the solutions