-9+2a=a-4

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



-9+2a=a-4

We move all terms to the left:

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

We get rid of parentheses

2a-a+4-9=0

We add all the numbers together, and all the variables

a-5=0

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

a=5

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