-72=-9a-45

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Solution for -72=-9a-45 equation: 



-72=-9a-45

We move all terms to the left:

-72-(-9a-45)=0

We get rid of parentheses

9a+45-72=0

We add all the numbers together, and all the variables

9a-27=0

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

9a=27

a=27/9

a=3

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