3b-9-8b=11

3b-9-8b=11

-5b = 11 + 9

b = 20/-5

b = ?

To solve the equation 3b - 9 - 8b = 11, you need to isolate the variable "b" on one side of the equation.

Start by combining the like terms. In this case, you have "3b" and "-8b" which can be combined to give "-5b". The equation becomes:

-5b - 9 = 11

Next, isolate the variable term by solving for "-5b". Add 9 to both sides of the equation:

-5b - 9 + 9 = 11 + 9

Simplifying the equation gives:

-5b = 20

To solve for "b", divide both sides of the equation by -5:

-5b / -5 = 20 / -5

This yields:

b = -4

So the solution to the equation 3b - 9 - 8b = 11 is b = -4.