21.39-2.10b=12.99

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Solution for 21.39-2.10b=12.99 equation: 


Simplifying
21.39 + -2.10b = 12.99

Solving
21.39 + -2.10b = 12.99

Solving for variable 'b'.

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

Add '-21.39' to each side of the equation.
21.39 + -21.39 + -2.10b = 12.99 + -21.39

Combine like terms: 21.39 + -21.39 = 0.00
0.00 + -2.10b = 12.99 + -21.39
-2.10b = 12.99 + -21.39

Combine like terms: 12.99 + -21.39 = -8.4
-2.10b = -8.4

Divide each side by '-2.10'.
b = 4

Simplifying
b = 4

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