-4=a-20

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Solution for -4=a-20 equation:


Simplifying
-4 = a + -20

Reorder the terms:
-4 = -20 + a

Solving
-4 = -20 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-4 + -1a = -20 + a + -1a

Combine like terms: a + -1a = 0
-4 + -1a = -20 + 0
-4 + -1a = -20

Add '4' to each side of the equation.
-4 + 4 + -1a = -20 + 4

Combine like terms: -4 + 4 = 0
0 + -1a = -20 + 4
-1a = -20 + 4

Combine like terms: -20 + 4 = -16
-1a = -16

Divide each side by '-1'.
a = 16

Simplifying
a = 16

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