9-a=2a+13

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Solution for 9-a=2a+13 equation:


Simplifying
9 + -1a = 2a + 13

Reorder the terms:
9 + -1a = 13 + 2a

Solving
9 + -1a = 13 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
9 + -1a + -2a = 13 + 2a + -2a

Combine like terms: -1a + -2a = -3a
9 + -3a = 13 + 2a + -2a

Combine like terms: 2a + -2a = 0
9 + -3a = 13 + 0
9 + -3a = 13

Add '-9' to each side of the equation.
9 + -9 + -3a = 13 + -9

Combine like terms: 9 + -9 = 0
0 + -3a = 13 + -9
-3a = 13 + -9

Combine like terms: 13 + -9 = 4
-3a = 4

Divide each side by '-3'.
a = -1.333333333

Simplifying
a = -1.333333333

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