Question 161878
-2[4-(3b+2)]=5-2(3b+6)
-2[4-3b+2]=5-6b-12
-2[6-3b]=-6b-7
-12+6b=-6b-7
6b+6b=-7+12
12b=5
b=5/12
proof:
-2[4-3*5/12+2]=5-2(3*5/12+6)
-2[4-15/12+2]=5-2(15/12+6)
-2[6-15/12]=5-30/12-12
-12+30/12=-7-30/12
30/12+30/12=-7+12
60/12=5
5=5