4x+8-5=3a+2 4x=3a-1，x=1/4(3a-1) (3a+1)÷3×x=a(2x+3)÷2,ax+1/3x=ax+3/2a x=9/2a x1=x2 1/4(3a-1) =9/2a 3a-1=18a 15a=-1 a=-1/15
