9=-3(b+-4)

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Solution for 9=-3(b+-4) equation:


Simplifying
9 = -3(b + -4)

Reorder the terms:
9 = -3(-4 + b)
9 = (-4 * -3 + b * -3)
9 = (12 + -3b)

Solving
9 = 12 + -3b

Solving for variable 'b'.

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

Add '3b' to each side of the equation.
9 + 3b = 12 + -3b + 3b

Combine like terms: -3b + 3b = 0
9 + 3b = 12 + 0
9 + 3b = 12

Add '-9' to each side of the equation.
9 + -9 + 3b = 12 + -9

Combine like terms: 9 + -9 = 0
0 + 3b = 12 + -9
3b = 12 + -9

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

Divide each side by '3'.
b = 1

Simplifying
b = 1

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