2a+9=a+15

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Solution for 2a+9=a+15 equation:


Simplifying
2a + 9 = a + 15

Reorder the terms:
9 + 2a = a + 15

Reorder the terms:
9 + 2a = 15 + a

Solving
9 + 2a = 15 + 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.
9 + 2a + -1a = 15 + a + -1a

Combine like terms: 2a + -1a = 1a
9 + 1a = 15 + a + -1a

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

Add '-9' to each side of the equation.
9 + -9 + 1a = 15 + -9

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

Combine like terms: 15 + -9 = 6
1a = 6

Divide each side by '1'.
a = 6

Simplifying
a = 6

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