-99=3(-4b-5)

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Solution for -99=3(-4b-5) equation:


Simplifying
-99 = 3(-4b + -5)

Reorder the terms:
-99 = 3(-5 + -4b)
-99 = (-5 * 3 + -4b * 3)
-99 = (-15 + -12b)

Solving
-99 = -15 + -12b

Solving for variable 'b'.

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

Add '12b' to each side of the equation.
-99 + 12b = -15 + -12b + 12b

Combine like terms: -12b + 12b = 0
-99 + 12b = -15 + 0
-99 + 12b = -15

Add '99' to each side of the equation.
-99 + 99 + 12b = -15 + 99

Combine like terms: -99 + 99 = 0
0 + 12b = -15 + 99
12b = -15 + 99

Combine like terms: -15 + 99 = 84
12b = 84

Divide each side by '12'.
b = 7

Simplifying
b = 7

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