2x+(1/3)(x-1)=4x-5
2x+(x-1)/3=4x-5
6x+x-1=12x-15
7x-1=12x-15
-1=5x-15
5x-14=0
x=14/5
将x=14/5代入ax-3x=2a得到:
(14/5)(a-3)=2a
14(a-3)=10a
14a-42=10a
4a-42=0
a=21/2