-6=9+a+a+4

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Solution for -6=9+a+a+4 equation:


Simplifying
-6 = 9 + a + a + 4

Reorder the terms:
-6 = 9 + 4 + a + a

Combine like terms: 9 + 4 = 13
-6 = 13 + a + a

Combine like terms: a + a = 2a
-6 = 13 + 2a

Solving
-6 = 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.
-6 + -2a = 13 + 2a + -2a

Combine like terms: 2a + -2a = 0
-6 + -2a = 13 + 0
-6 + -2a = 13

Add '6' to each side of the equation.
-6 + 6 + -2a = 13 + 6

Combine like terms: -6 + 6 = 0
0 + -2a = 13 + 6
-2a = 13 + 6

Combine like terms: 13 + 6 = 19
-2a = 19

Divide each side by '-2'.
a = -9.5

Simplifying
a = -9.5

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