4a+9a=5

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Solution for 4a+9a=5 equation: 


Simplifying
4a + 9a = 5

Combine like terms: 4a + 9a = 13a
13a = 5

Solving
13a = 5

Solving for variable 'a'.

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

Divide each side by '13'.
a = 0.3846153846

Simplifying
a = 0.3846153846

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