84=-4(4+5b)

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Solution for 84=-4(4+5b) equation:


Simplifying
84 = -4(4 + 5b)
84 = (4 * -4 + 5b * -4)
84 = (-16 + -20b)

Solving
84 = -16 + -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.
84 + 20b = -16 + -20b + 20b

Combine like terms: -20b + 20b = 0
84 + 20b = -16 + 0
84 + 20b = -16

Add '-84' to each side of the equation.
84 + -84 + 20b = -16 + -84

Combine like terms: 84 + -84 = 0
0 + 20b = -16 + -84
20b = -16 + -84

Combine like terms: -16 + -84 = -100
20b = -100

Divide each side by '20'.
b = -5

Simplifying
b = -5

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