84=4(1-5a)

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Solution for 84=4(1-5a) equation:


Simplifying
84 = 4(1 + -5a)
84 = (1 * 4 + -5a * 4)
84 = (4 + -20a)

Solving
84 = 4 + -20a

Solving for variable 'a'.

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

Add '20a' to each side of the equation.
84 + 20a = 4 + -20a + 20a

Combine like terms: -20a + 20a = 0
84 + 20a = 4 + 0
84 + 20a = 4

Add '-84' to each side of the equation.
84 + -84 + 20a = 4 + -84

Combine like terms: 84 + -84 = 0
0 + 20a = 4 + -84
20a = 4 + -84

Combine like terms: 4 + -84 = -80
20a = -80

Divide each side by '20'.
a = -4

Simplifying
a = -4

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