-39=-19-a

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Solution for -39=-19-a equation:


Simplifying
-39 = -19 + -1a

Solving
-39 = -19 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
-39 + a = -19 + -1a + a

Combine like terms: -1a + a = 0
-39 + a = -19 + 0
-39 + a = -19

Add '39' to each side of the equation.
-39 + 39 + a = -19 + 39

Combine like terms: -39 + 39 = 0
0 + a = -19 + 39
a = -19 + 39

Combine like terms: -19 + 39 = 20
a = 20

Simplifying
a = 20

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