3(7+4b)=81

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Solution for 3(7+4b)=81 equation: 


Simplifying
3(7 + 4b) = 81
(7 * 3 + 4b * 3) = 81
(21 + 12b) = 81

Solving
21 + 12b = 81

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 + 12b = 81 + -21

Combine like terms: 21 + -21 = 0
0 + 12b = 81 + -21
12b = 81 + -21

Combine like terms: 81 + -21 = 60
12b = 60

Divide each side by '12'.
b = 5

Simplifying
b = 5

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