若la-5l+lb+6l=0,求-b-a-(-2/3)的值

若la-5l+lb+6l=0,求-b-a-(-2/3)的值

la-5l+lb+6l=0得出:
a-5=0,b+6=0所以a=5,b=-6
-(-6)- 5-(-2/3)=5/3