72=-9a-4a-6=72

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Solution for 72=-9a-4a-6=72 equation: 



72=-9a-4a-6=72

We move all terms to the left:

72-(-9a-4a-6)=0

We add all the numbers together, and all the variables

-(-13a-6)+72=0

We get rid of parentheses

13a+6+72=0

We add all the numbers together, and all the variables

13a+78=0

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

13a=-78

a=-78/13

a=-6

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