3(b+5)=12

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Solution for 3(b+5)=12 equation: 


Simplifying
3(b + 5) = 12

Reorder the terms:
3(5 + b) = 12
(5 * 3 + b * 3) = 12
(15 + 3b) = 12

Solving
15 + 3b = 12

Solving for variable 'b'.

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

Add '-15' to each side of the equation.
15 + -15 + 3b = 12 + -15

Combine like terms: 15 + -15 = 0
0 + 3b = 12 + -15
3b = 12 + -15

Combine like terms: 12 + -15 = -3
3b = -3

Divide each side by '3'.
b = -1

Simplifying
b = -1

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