9a+4a=-13

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Solution for 9a+4a=-13 equation: 


Simplifying
9a + 4a = -13

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

Solving
13a = -13

Solving for variable 'a'.

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

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

Simplifying
a = -1

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