4(2a+9)=5(a+15)

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Solution for 4(2a+9)=5(a+15) equation: 



4(2a+9)=5(a+15)

We move all terms to the left:

4(2a+9)-(5(a+15))=0

We multiply parentheses

8a-(5(a+15))+36=0



We calculate terms in parentheses: -(5(a+15)), so:

5(a+15)

We multiply parentheses

5a+75

Back to the equation:

-(5a+75)



We get rid of parentheses

8a-5a-75+36=0

We add all the numbers together, and all the variables

3a-39=0

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

3a=39

a=39/3

a=13

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