20b=8-9(-b-4)

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Solution for 20b=8-9(-b-4) equation:


Simplifying
20b = 8 + -9(-1b + -4)

Reorder the terms:
20b = 8 + -9(-4 + -1b)
20b = 8 + (-4 * -9 + -1b * -9)
20b = 8 + (36 + 9b)

Combine like terms: 8 + 36 = 44
20b = 44 + 9b

Solving
20b = 44 + 9b

Solving for variable 'b'.

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

Add '-9b' to each side of the equation.
20b + -9b = 44 + 9b + -9b

Combine like terms: 20b + -9b = 11b
11b = 44 + 9b + -9b

Combine like terms: 9b + -9b = 0
11b = 44 + 0
11b = 44

Divide each side by '11'.
b = 4

Simplifying
b = 4

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