2a+4=9a-45

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Solution for 2a+4=9a-45 equation: 



2a+4=9a-45

We move all terms to the left:

2a+4-(9a-45)=0

We get rid of parentheses

2a-9a+45+4=0

We add all the numbers together, and all the variables

-7a+49=0

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

-7a=-49

a=-49/-7

a=+7

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