9-a=4(a-10)

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Solution for 9-a=4(a-10) equation: 



9-a=4(a-10)

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1a-(4(a-10))+9=0



We calculate terms in parentheses: -(4(a-10)), so:

4(a-10)

We multiply parentheses

4a-40

Back to the equation:

-(4a-40)



We get rid of parentheses

-1a-4a+40+9=0

We add all the numbers together, and all the variables

-5a+49=0

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

-5a=-49

a=-49/-5

a=9+4/5

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