J(a)=2a+9

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Solution for J(a)=2a+9 equation: 



(J)=2J+9

We move all terms to the left:

(J)-(2J+9)=0

We get rid of parentheses

J-2J-9=0

We add all the numbers together, and all the variables

-1J-9=0

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

-J=9

J=9/-1

J=-9

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