84=-4(3a-4)

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Solution for 84=-4(3a-4) equation:


Simplifying
84 = -4(3a + -4)

Reorder the terms:
84 = -4(-4 + 3a)
84 = (-4 * -4 + 3a * -4)
84 = (16 + -12a)

Solving
84 = 16 + -12a

Solving for variable 'a'.

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

Add '12a' to each side of the equation.
84 + 12a = 16 + -12a + 12a

Combine like terms: -12a + 12a = 0
84 + 12a = 16 + 0
84 + 12a = 16

Add '-84' to each side of the equation.
84 + -84 + 12a = 16 + -84

Combine like terms: 84 + -84 = 0
0 + 12a = 16 + -84
12a = 16 + -84

Combine like terms: 16 + -84 = -68
12a = -68

Divide each side by '12'.
a = -5.666666667

Simplifying
a = -5.666666667

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