7a-4a+9=-9a+81-6a

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Solution for 7a-4a+9=-9a+81-6a equation: 



7a-4a+9=-9a+81-6a

We move all terms to the left:

7a-4a+9-(-9a+81-6a)=0

We add all the numbers together, and all the variables

7a-4a-(-15a+81)+9=0

We add all the numbers together, and all the variables

3a-(-15a+81)+9=0

We get rid of parentheses

3a+15a-81+9=0

We add all the numbers together, and all the variables

18a-72=0

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

18a=72

a=72/18

a=4

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