3a=a+9

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Solution for 3a=a+9 equation: 


Simplifying
3a = a + 9

Reorder the terms:
3a = 9 + a

Solving
3a = 9 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
3a + -1a = 9 + a + -1a

Combine like terms: 3a + -1a = 2a
2a = 9 + a + -1a

Combine like terms: a + -1a = 0
2a = 9 + 0
2a = 9

Divide each side by '2'.
a = 4.5

Simplifying
a = 4.5

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