9a+11a=-5+21

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Solution for 9a+11a=-5+21 equation: 


Simplifying
9a + 11a = -5 + 21

Combine like terms: 9a + 11a = 20a
20a = -5 + 21

Combine like terms: -5 + 21 = 16
20a = 16

Solving
20a = 16

Solving for variable 'a'.

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

Divide each side by '20'.
a = 0.8

Simplifying
a = 0.8

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