-6a+5+7a=12-20

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Solution for -6a+5+7a=12-20 equation:


Simplifying
-6a + 5 + 7a = 12 + -20

Reorder the terms:
5 + -6a + 7a = 12 + -20

Combine like terms: -6a + 7a = 1a
5 + 1a = 12 + -20

Combine like terms: 12 + -20 = -8
5 + 1a = -8

Solving
5 + 1a = -8

Solving for variable 'a'.

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

Add '-5' to each side of the equation.
5 + -5 + 1a = -8 + -5

Combine like terms: 5 + -5 = 0
0 + 1a = -8 + -5
1a = -8 + -5

Combine like terms: -8 + -5 = -13
1a = -13

Divide each side by '1'.
a = -13

Simplifying
a = -13

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