19a+-20a=-4

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Solution for 19a+-20a=-4 equation: 


Simplifying
19a + -20a = -4

Combine like terms: 19a + -20a = -1a
-1a = -4

Solving
-1a = -4

Solving for variable 'a'.

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

Divide each side by '-1'.
a = 4

Simplifying
a = 4

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