-480=-20(-4b)

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Solution for -480=-20(-4b) equation: 


Simplifying
-480 = -20(-4b)

Remove parenthesis around (-4b)
-480 = -20 * -4b

Multiply -20 * -4
-480 = 80b

Solving
-480 = 80b

Solving for variable 'b'.

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

Add '-80b' to each side of the equation.
-480 + -80b = 80b + -80b

Combine like terms: 80b + -80b = 0
-480 + -80b = 0

Add '480' to each side of the equation.
-480 + 480 + -80b = 0 + 480

Combine like terms: -480 + 480 = 0
0 + -80b = 0 + 480
-80b = 0 + 480

Combine like terms: 0 + 480 = 480
-80b = 480

Divide each side by '-80'.
b = -6

Simplifying
b = -6

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