4a-15=a-9

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Solution for 4a-15=a-9 equation:


Simplifying
4a + -15 = a + -9

Reorder the terms:
-15 + 4a = a + -9

Reorder the terms:
-15 + 4a = -9 + a

Solving
-15 + 4a = -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.
-15 + 4a + -1a = -9 + a + -1a

Combine like terms: 4a + -1a = 3a
-15 + 3a = -9 + a + -1a

Combine like terms: a + -1a = 0
-15 + 3a = -9 + 0
-15 + 3a = -9

Add '15' to each side of the equation.
-15 + 15 + 3a = -9 + 15

Combine like terms: -15 + 15 = 0
0 + 3a = -9 + 15
3a = -9 + 15

Combine like terms: -9 + 15 = 6
3a = 6

Divide each side by '3'.
a = 2

Simplifying
a = 2

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