3(7-2b)-2b=5

Solution for 3(7-2b)-2b=5 equation:

Simplifying
3(7 + -2b) + -2b = 5
(7 * 3 + -2b * 3) + -2b = 5
(21 + -6b) + -2b = 5

Combine like terms: -6b + -2b = -8b
21 + -8b = 5

Solving
21 + -8b = 5

Solving for variable 'b'.

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

Add '-21' to each side of the equation.
21 + -21 + -8b = 5 + -21

Combine like terms: 21 + -21 = 0
0 + -8b = 5 + -21
-8b = 5 + -21

Combine like terms: 5 + -21 = -16
-8b = -16

Divide each side by '-8'.
b = 2

Simplifying
b = 2