7a-9a=2a

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Solution for 7a-9a=2a equation: 


Simplifying
7a + -9a = 2a

Combine like terms: 7a + -9a = -2a
-2a = 2a

Solving
-2a = 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
-2a + -2a = 2a + -2a

Combine like terms: -2a + -2a = -4a
-4a = 2a + -2a

Combine like terms: 2a + -2a = 0
-4a = 0

Divide each side by '-4'.
a = 0

Simplifying
a = 0

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