-3a-a=-4

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Solution for -3a-a=-4 equation: 


Simplifying
-3a + -1a = -4

Combine like terms: -3a + -1a = -4a
-4a = -4

Solving
-4a = -4

Solving for variable 'a'.

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

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

Simplifying
a = 1

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