9=-2(2+8b)-4b

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Solution for 9=-2(2+8b)-4b equation:


Simplifying
9 = -2(2 + 8b) + -4b
9 = (2 * -2 + 8b * -2) + -4b
9 = (-4 + -16b) + -4b

Combine like terms: -16b + -4b = -20b
9 = -4 + -20b

Solving
9 = -4 + -20b

Solving for variable 'b'.

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

Add '20b' to each side of the equation.
9 + 20b = -4 + -20b + 20b

Combine like terms: -20b + 20b = 0
9 + 20b = -4 + 0
9 + 20b = -4

Add '-9' to each side of the equation.
9 + -9 + 20b = -4 + -9

Combine like terms: 9 + -9 = 0
0 + 20b = -4 + -9
20b = -4 + -9

Combine like terms: -4 + -9 = -13
20b = -13

Divide each side by '20'.
b = -0.65

Simplifying
b = -0.65

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