4a=2(a+9)

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Solution for 4a=2(a+9) equation: 



4a=2(a+9)

We move all terms to the left:

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



We calculate terms in parentheses: -(2(a+9)), so:

2(a+9)

We multiply parentheses

2a+18

Back to the equation:

-(2a+18)



We get rid of parentheses

4a-2a-18=0

We add all the numbers together, and all the variables

2a-18=0

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

2a=18

a=18/2

a=9

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