4a-9=1-a

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Solution for 4a-9=1-a equation: 



4a-9=1-a

We move all terms to the left:

4a-9-(1-a)=0

We add all the numbers together, and all the variables

4a-(-1a+1)-9=0

We get rid of parentheses

4a+1a-1-9=0

We add all the numbers together, and all the variables

5a-10=0

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

5a=10

a=10/5

a=2

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