-a-3a=-3a+4

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


Simplifying
-1a + -3a = -3a + 4

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

Reorder the terms:
-4a = 4 + -3a

Solving
-4a = 4 + -3a

Solving for variable 'a'.

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

Add '3a' to each side of the equation.
-4a + 3a = 4 + -3a + 3a

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

Combine like terms: -3a + 3a = 0
-1a = 4 + 0
-1a = 4

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

Simplifying
a = -4

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