SOLUTION: -1/2[ 12 + ( 12 - 1)) ]
Algebra.Com
Question 331074:  -1/2[ 12 + ( 12 - 1)) ] 
Answer by Tutorteddy.Com(12)   (Show Source): You can put this solution on YOUR website!
 -1/2[ 12 + ( 12 - 1)) ]
= -1/2[12 + 11]
= (-1/2) X 23
= -23/2 
RELATED QUESTIONS
6
-  = 12... (answered by checkley77)
{{{ -1/3y^2+12... (answered by Alan3354)
2
6
	+	
1... (answered by Alan3354)
-2(5n+1)=12 (answered by jim_thompson5910)
1/2+10/12= (answered by rfer)
2=12/3y-1 (answered by Alan3354)
-1/2|-12| (answered by josgarithmetic)
-(1)/(2)x<-12
 (answered by MathLover1)
1/12:1/8= 2:?
 ?=
 (answered by MathLover1)