-2a+19=-21

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Solution for -2a+19=-21 equation: 


Simplifying
-2a + 19 = -21

Reorder the terms:
19 + -2a = -21

Solving
19 + -2a = -21

Solving for variable 'a'.

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

Add '-19' to each side of the equation.
19 + -19 + -2a = -21 + -19

Combine like terms: 19 + -19 = 0
0 + -2a = -21 + -19
-2a = -21 + -19

Combine like terms: -21 + -19 = -40
-2a = -40

Divide each side by '-2'.
a = 20

Simplifying
a = 20

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