18a-3(a+5)=5(a+9)

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Solution for 18a-3(a+5)=5(a+9) equation: 



18a-3(a+5)=5(a+9)

We move all terms to the left:

18a-3(a+5)-(5(a+9))=0

We multiply parentheses

18a-3a-(5(a+9))-15=0



We calculate terms in parentheses: -(5(a+9)), so:

5(a+9)

We multiply parentheses

5a+45

Back to the equation:

-(5a+45)



We add all the numbers together, and all the variables

15a-(5a+45)-15=0

We get rid of parentheses

15a-5a-45-15=0

We add all the numbers together, and all the variables

10a-60=0

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

10a=60

a=60/10

a=6

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