11b+6=8b+21

Solution for 11b+6=8b+21 equation:

Simplifying
11b + 6 = 8b + 21

Reorder the terms:
6 + 11b = 8b + 21

Reorder the terms:
6 + 11b = 21 + 8b

Solving
6 + 11b = 21 + 8b

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '-8b' to each side of the equation.
6 + 11b + -8b = 21 + 8b + -8b

Combine like terms: 11b + -8b = 3b
6 + 3b = 21 + 8b + -8b

Combine like terms: 8b + -8b = 0
6 + 3b = 21 + 0
6 + 3b = 21

Add '-6' to each side of the equation.
6 + -6 + 3b = 21 + -6

Combine like terms: 6 + -6 = 0
0 + 3b = 21 + -6
3b = 21 + -6

Combine like terms: 21 + -6 = 15
3b = 15

Divide each side by '3'.
b = 5

Simplifying
b = 5