2a-4a=-4

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Solution for 2a-4a=-4 equation: 


Simplifying
2a + -4a = -4

Combine like terms: 2a + -4a = -2a
-2a = -4

Solving
-2a = -4

Solving for variable 'a'.

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

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

Simplifying
a = 2

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