2a+4=9a

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Solution for 2a+4=9a equation: 



2a+4=9a

We move all terms to the left:

2a+4-(9a)=0

We add all the numbers together, and all the variables

-7a+4=0

We move all terms containing a to the left, all other terms to the right

-7a=-4

a=-4/-7

a=4/7

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