Answer :
13+6b=-5(7-6b) -- expand brackets
13+6b=-35+30b -- subtract 6b and add 35 to both sides
48=24b -- divide by 24
2=b
b=2
13+6b=-35+30b -- subtract 6b and add 35 to both sides
48=24b -- divide by 24
2=b
b=2
