12a-3a-4=5

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Solution for 12a-3a-4=5 equation: 


Simplifying
12a + -3a + -4 = 5

Reorder the terms:
-4 + 12a + -3a = 5

Combine like terms: 12a + -3a = 9a
-4 + 9a = 5

Solving
-4 + 9a = 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 + 9a = 5 + 4

Combine like terms: -4 + 4 = 0
0 + 9a = 5 + 4
9a = 5 + 4

Combine like terms: 5 + 4 = 9
9a = 9

Divide each side by '9'.
a = 1

Simplifying
a = 1

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