2a+2a=12+9

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Solution for 2a+2a=12+9 equation: 


Simplifying
2a + 2a = 12 + 9

Combine like terms: 2a + 2a = 4a
4a = 12 + 9

Combine like terms: 12 + 9 = 21
4a = 21

Solving
4a = 21

Solving for variable 'a'.

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

Divide each side by '4'.
a = 5.25

Simplifying
a = 5.25

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