Question

-9+7b=8b -7

Answer 1

we want variable and constants on two different sides so how would you separate them?

Answer 2

-7b both sides +7 both sides b=-2

Answer 3

thanks

Answer 4

-9+7b=8b -7 get b on one side so subtract 7 from both sides
-9=b-7 add 7 to both sides
b=-2