-a-20=-3

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Solution for -a-20=-3 equation:


Simplifying
-1a + -20 = -3

Reorder the terms:
-20 + -1a = -3

Solving
-20 + -1a = -3

Solving for variable 'a'.

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

Add '20' to each side of the equation.
-20 + 20 + -1a = -3 + 20

Combine like terms: -20 + 20 = 0
0 + -1a = -3 + 20
-1a = -3 + 20

Combine like terms: -3 + 20 = 17
-1a = 17

Divide each side by '-1'.
a = -17

Simplifying
a = -17

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