2(b-21)=5b

Solution for 2(b-21)=5b equation:

Simplifying
2(b + -21) = 5b

Reorder the terms:
2(-21 + b) = 5b
(-21 * 2 + b * 2) = 5b
(-42 + 2b) = 5b

Solving
-42 + 2b = 5b

Solving for variable 'b'.

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

Add '-5b' to each side of the equation.
-42 + 2b + -5b = 5b + -5b

Combine like terms: 2b + -5b = -3b
-42 + -3b = 5b + -5b

Combine like terms: 5b + -5b = 0
-42 + -3b = 0

Add '42' to each side of the equation.
-42 + 42 + -3b = 0 + 42

Combine like terms: -42 + 42 = 0
0 + -3b = 0 + 42
-3b = 0 + 42

Combine like terms: 0 + 42 = 42
-3b = 42

Divide each side by '-3'.
b = -14

Simplifying
b = -14