2a+a=-21

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Solution for 2a+a=-21 equation: 


Simplifying
2a + a = -21

Combine like terms: 2a + a = 3a
3a = -21

Solving
3a = -21

Solving for variable 'a'.

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

Divide each side by '3'.
a = -7

Simplifying
a = -7

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