2a-4=-5

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Solution for 2a-4=-5 equation: 


Simplifying
2a + -4 = -5

Reorder the terms:
-4 + 2a = -5

Solving
-4 + 2a = -5

Solving for variable 'a'.

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

Add '4' to each side of the equation.
-4 + 4 + 2a = -5 + 4

Combine like terms: -4 + 4 = 0
0 + 2a = -5 + 4
2a = -5 + 4

Combine like terms: -5 + 4 = -1
2a = -1

Divide each side by '2'.
a = -0.5

Simplifying
a = -0.5

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