4(a-4)=20

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


Simplifying
4(a + -4) = 20

Reorder the terms:
4(-4 + a) = 20
(-4 * 4 + a * 4) = 20
(-16 + 4a) = 20

Solving
-16 + 4a = 20

Solving for variable 'a'.

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

Add '16' to each side of the equation.
-16 + 16 + 4a = 20 + 16

Combine like terms: -16 + 16 = 0
0 + 4a = 20 + 16
4a = 20 + 16

Combine like terms: 20 + 16 = 36
4a = 36

Divide each side by '4'.
a = 9

Simplifying
a = 9

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