6a-7a=9

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Solution for 6a-7a=9 equation: 


Simplifying
6a + -7a = 9

Combine like terms: 6a + -7a = -1a
-1a = 9

Solving
-1a = 9

Solving for variable 'a'.

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

Divide each side by '-1'.
a = -9

Simplifying
a = -9

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