a+2a-6a=-15

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Solution for a+2a-6a=-15 equation: 


Simplifying
a + 2a + -6a = -15

Combine like terms: a + 2a = 3a
3a + -6a = -15

Combine like terms: 3a + -6a = -3a
-3a = -15

Solving
-3a = -15

Solving for variable 'a'.

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

Divide each side by '-3'.
a = 5

Simplifying
a = 5

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