-3(11+a)=7(3-3a)

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Solution for -3(11+a)=7(3-3a) equation: 



-3(11+a)=7(3-3a)

We move all terms to the left:

-3(11+a)-(7(3-3a))=0

We add all the numbers together, and all the variables

-3(a+11)-(7(-3a+3))=0

We multiply parentheses

-3a-(7(-3a+3))-33=0



We calculate terms in parentheses: -(7(-3a+3)), so:

7(-3a+3)

We multiply parentheses

-21a+21

Back to the equation:

-(-21a+21)



We get rid of parentheses

-3a+21a-21-33=0

We add all the numbers together, and all the variables

18a-54=0

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

18a=54

a=54/18

a=3

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