2a+3a=-21

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Solution for 2a+3a=-21 equation: 


Simplifying
2a + 3a = -21

Combine like terms: 2a + 3a = 5a
5a = -21

Solving
5a = -21

Solving for variable 'a'.

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

Divide each side by '5'.
a = -4.2

Simplifying
a = -4.2

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