3a-9=3a-9

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Solution for 3a-9=3a-9 equation: 


Simplifying
3a + -9 = 3a + -9

Reorder the terms:
-9 + 3a = 3a + -9

Reorder the terms:
-9 + 3a = -9 + 3a

Add '9' to each side of the equation.
-9 + 9 + 3a = -9 + 9 + 3a

Combine like terms: -9 + 9 = 0
0 + 3a = -9 + 9 + 3a
3a = -9 + 9 + 3a

Combine like terms: -9 + 9 = 0
3a = 0 + 3a
3a = 3a

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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