90=-3(6+6b)

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


Simplifying
90 = -3(6 + 6b)
90 = (6 * -3 + 6b * -3)
90 = (-18 + -18b)

Solving
90 = -18 + -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 = -18 + -18b + 18b

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

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

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

Combine like terms: -18 + -90 = -108
18b = -108

Divide each side by '18'.
b = -6

Simplifying
b = -6

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