3(b+7)=12

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Solution for 3(b+7)=12 equation: 


Simplifying
3(b + 7) = 12

Reorder the terms:
3(7 + b) = 12
(7 * 3 + b * 3) = 12
(21 + 3b) = 12

Solving
21 + 3b = 12

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 + 3b = 12 + -21

Combine like terms: 21 + -21 = 0
0 + 3b = 12 + -21
3b = 12 + -21

Combine like terms: 12 + -21 = -9
3b = -9

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

Simplifying
b = -3

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