2a+4=a-9

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Solution for 2a+4=a-9 equation:


Simplifying
2a + 4 = a + -9

Reorder the terms:
4 + 2a = a + -9

Reorder the terms:
4 + 2a = -9 + a

Solving
4 + 2a = -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.
4 + 2a + -1a = -9 + a + -1a

Combine like terms: 2a + -1a = 1a
4 + 1a = -9 + a + -1a

Combine like terms: a + -1a = 0
4 + 1a = -9 + 0
4 + 1a = -9

Add '-4' to each side of the equation.
4 + -4 + 1a = -9 + -4

Combine like terms: 4 + -4 = 0
0 + 1a = -9 + -4
1a = -9 + -4

Combine like terms: -9 + -4 = -13
1a = -13

Divide each side by '1'.
a = -13

Simplifying
a = -13

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