2=21+b

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Solution for 2=21+b equation:


Simplifying
2 = 21 + b

Solving
2 = 21 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
2 + -1b = 21 + b + -1b

Combine like terms: b + -1b = 0
2 + -1b = 21 + 0
2 + -1b = 21

Add '-2' to each side of the equation.
2 + -2 + -1b = 21 + -2

Combine like terms: 2 + -2 = 0
0 + -1b = 21 + -2
-1b = 21 + -2

Combine like terms: 21 + -2 = 19
-1b = 19

Divide each side by '-1'.
b = -19

Simplifying
b = -19

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