2a+9=20

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Solution for 2a+9=20 equation: 



2a+9=20

We move all terms to the left:

2a+9-(20)=0

We add all the numbers together, and all the variables

2a-11=0

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

2a=11

a=11/2

a=5+1/2

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