4=4-7a-5a

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Solution for 4=4-7a-5a equation: 



4=4-7a-5a

We move all terms to the left:

4-(4-7a-5a)=0

We add all the numbers together, and all the variables

-(-12a+4)+4=0

We get rid of parentheses

12a-4+4=0

We add all the numbers together, and all the variables

12a=0

a=0/12

a=0

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