13b+42=81

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Solution for 13b+42=81 equation:


Simplifying
13b + 42 = 81

Reorder the terms:
42 + 13b = 81

Solving
42 + 13b = 81

Solving for variable 'b'.

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

Add '-42' to each side of the equation.
42 + -42 + 13b = 81 + -42

Combine like terms: 42 + -42 = 0
0 + 13b = 81 + -42
13b = 81 + -42

Combine like terms: 81 + -42 = 39
13b = 39

Divide each side by '13'.
b = 3

Simplifying
b = 3

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