3a-6=a-9

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Solution for 3a-6=a-9 equation:


Simplifying
3a + -6 = a + -9

Reorder the terms:
-6 + 3a = a + -9

Reorder the terms:
-6 + 3a = -9 + a

Solving
-6 + 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.
-6 + 3a + -1a = -9 + a + -1a

Combine like terms: 3a + -1a = 2a
-6 + 2a = -9 + a + -1a

Combine like terms: a + -1a = 0
-6 + 2a = -9 + 0
-6 + 2a = -9

Add '6' to each side of the equation.
-6 + 6 + 2a = -9 + 6

Combine like terms: -6 + 6 = 0
0 + 2a = -9 + 6
2a = -9 + 6

Combine like terms: -9 + 6 = -3
2a = -3

Divide each side by '2'.
a = -1.5

Simplifying
a = -1.5

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