45=-3a-9

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Solution for 45=-3a-9 equation: 



45=-3a-9

We move all terms to the left:

45-(-3a-9)=0

We get rid of parentheses

3a+9+45=0

We add all the numbers together, and all the variables

3a+54=0

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

3a=-54

a=-54/3

a=-18

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