3a+12a=-7

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Solution for 3a+12a=-7 equation: 


Simplifying
3a + 12a = -7

Combine like terms: 3a + 12a = 15a
15a = -7

Solving
15a = -7

Solving for variable 'a'.

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

Divide each side by '15'.
a = -0.4666666667

Simplifying
a = -0.4666666667

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