-84=-2(2-5b)

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Solution for -84=-2(2-5b) equation:


Simplifying
-84 = -2(2 + -5b)
-84 = (2 * -2 + -5b * -2)
-84 = (-4 + 10b)

Solving
-84 = -4 + 10b

Solving for variable 'b'.

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

Add '-10b' to each side of the equation.
-84 + -10b = -4 + 10b + -10b

Combine like terms: 10b + -10b = 0
-84 + -10b = -4 + 0
-84 + -10b = -4

Add '84' to each side of the equation.
-84 + 84 + -10b = -4 + 84

Combine like terms: -84 + 84 = 0
0 + -10b = -4 + 84
-10b = -4 + 84

Combine like terms: -4 + 84 = 80
-10b = 80

Divide each side by '-10'.
b = -8

Simplifying
b = -8

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