3(a-4)=-2(a-9)

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Solution for 3(a-4)=-2(a-9) equation: 



3(a-4)=-2(a-9)

We move all terms to the left:

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

We multiply parentheses

3a-(-2(a-9))-12=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

3a+2a-18-12=0

We add all the numbers together, and all the variables

5a-30=0

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

5a=30

a=30/5

a=6

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