15-3a=-9

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Solution for 15-3a=-9 equation: 


Simplifying
15 + -3a = -9

Solving
15 + -3a = -9

Solving for variable 'a'.

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

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

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

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

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

Simplifying
a = 8

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