Question

b-9+6b=30

Answer 1

add 9 to both sides:\[b+6b=39\]factor our the b:\[b(1+6)=39\]can you figure out the rest? :)

Answer 2

b-9+6b=30
7b-9=30
7b=39
b=5.57 or 36/7

Answer 3

^ 39/7