12b=-3(-5b+15)

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Solution for 12b=-3(-5b+15) equation:


Simplifying
12b = -3(-5b + 15)

Reorder the terms:
12b = -3(15 + -5b)
12b = (15 * -3 + -5b * -3)
12b = (-45 + 15b)

Solving
12b = -45 + 15b

Solving for variable 'b'.

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

Add '-15b' to each side of the equation.
12b + -15b = -45 + 15b + -15b

Combine like terms: 12b + -15b = -3b
-3b = -45 + 15b + -15b

Combine like terms: 15b + -15b = 0
-3b = -45 + 0
-3b = -45

Divide each side by '-3'.
b = 15

Simplifying
b = 15

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