= & gt
-6 & gt； 4x & gt4 = & gt3 & gt2x & gt-2 = & gt； -2 & lt； 2x< three
b & ltx+3 & lt； a = & gtb-3 & lt； x & lta-3 = >2(b-3)& lt； X<2 (a-3)
Because the solution set is the same, so
2(b-3) = -2
2(a-3) = 3
= & gtb=2，a=9/2