-5a-7a=-8a-12

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Solution for -5a-7a=-8a-12 equation: 


Simplifying
-5a + -7a = -8a + -12

Combine like terms: -5a + -7a = -12a
-12a = -8a + -12

Reorder the terms:
-12a = -12 + -8a

Solving
-12a = -12 + -8a

Solving for variable 'a'.

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

Add '8a' to each side of the equation.
-12a + 8a = -12 + -8a + 8a

Combine like terms: -12a + 8a = -4a
-4a = -12 + -8a + 8a

Combine like terms: -8a + 8a = 0
-4a = -12 + 0
-4a = -12

Divide each side by '-4'.
a = 3

Simplifying
a = 3

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