90=-6(3b-6)

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Solution for 90=-6(3b-6) equation:


Simplifying
90 = -6(3b + -6)

Reorder the terms:
90 = -6(-6 + 3b)
90 = (-6 * -6 + 3b * -6)
90 = (36 + -18b)

Solving
90 = 36 + -18b

Solving for variable 'b'.

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

Add '18b' to each side of the equation.
90 + 18b = 36 + -18b + 18b

Combine like terms: -18b + 18b = 0
90 + 18b = 36 + 0
90 + 18b = 36

Add '-90' to each side of the equation.
90 + -90 + 18b = 36 + -90

Combine like terms: 90 + -90 = 0
0 + 18b = 36 + -90
18b = 36 + -90

Combine like terms: 36 + -90 = -54
18b = -54

Divide each side by '18'.
b = -3

Simplifying
b = -3

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