2a+9=a+39

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Solution for 2a+9=a+39 equation: 



2a+9=a+39

We move all terms to the left:

2a+9-(a+39)=0

We get rid of parentheses

2a-a-39+9=0

We add all the numbers together, and all the variables

a-30=0

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

a=30

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