4-20=4a

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Solution for 4-20=4a equation:


Simplifying
4 + -20 = 4a

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

Solving
-16 = 4a

Solving for variable 'a'.

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

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

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

Add '16' to each side of the equation.
-16 + 16 + -4a = 0 + 16

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

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

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

Simplifying
a = -4

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