12a-3-7a=-1

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Solution for 12a-3-7a=-1 equation:


Simplifying
12a + -3 + -7a = -1

Reorder the terms:
-3 + 12a + -7a = -1

Combine like terms: 12a + -7a = 5a
-3 + 5a = -1

Solving
-3 + 5a = -1

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + 5a = -1 + 3

Combine like terms: -3 + 3 = 0
0 + 5a = -1 + 3
5a = -1 + 3

Combine like terms: -1 + 3 = 2
5a = 2

Divide each side by '5'.
a = 0.4

Simplifying
a = 0.4

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