11a=18a+21a+9=

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Solution for 11a=18a+21a+9= equation: 



11a=18a+21a+9=

We move all terms to the left:

11a-(18a+21a+9)=0

We add all the numbers together, and all the variables

11a-(39a+9)=0

We get rid of parentheses

11a-39a-9=0

We add all the numbers together, and all the variables

-28a-9=0

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

-28a=9

a=9/-28

a=-9/28

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