4=-10a+9a

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Solution for 4=-10a+9a equation: 



4=-10a+9a

We move all terms to the left:

4-(-10a+9a)=0

We add all the numbers together, and all the variables

-(-1a)+4=0

We get rid of parentheses

1a+4=0

We add all the numbers together, and all the variables

a+4=0

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

a=-4

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