-7(1-4a)=20

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Solution for -7(1-4a)=20 equation: 


Simplifying
-7(1 + -4a) = 20
(1 * -7 + -4a * -7) = 20
(-7 + 28a) = 20

Solving
-7 + 28a = 20

Solving for variable 'a'.

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

Add '7' to each side of the equation.
-7 + 7 + 28a = 20 + 7

Combine like terms: -7 + 7 = 0
0 + 28a = 20 + 7
28a = 20 + 7

Combine like terms: 20 + 7 = 27
28a = 27

Divide each side by '28'.
a = 0.9642857143

Simplifying
a = 0.9642857143

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