9+3a=-15

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Solution for 9+3a=-15 equation: 


Simplifying
9 + 3a = -15

Solving
9 + 3a = -15

Solving for variable 'a'.

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

Add '-9' to each side of the equation.
9 + -9 + 3a = -15 + -9

Combine like terms: 9 + -9 = 0
0 + 3a = -15 + -9
3a = -15 + -9

Combine like terms: -15 + -9 = -24
3a = -24

Divide each side by '3'.
a = -8

Simplifying
a = -8

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