3a+9-(a+7)=a+3-(3a+9)

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Solution for 3a+9-(a+7)=a+3-(3a+9) equation: 



3a+9-(a+7)=a+3-(3a+9)

We move all terms to the left:

3a+9-(a+7)-(a+3-(3a+9))=0

We get rid of parentheses

3a-a-(a+3-(3a+9))-7+9=0



We calculate terms in parentheses: -(a+3-(3a+9)), so:

a+3-(3a+9)

determiningTheFunctionDomain
a-(3a+9)+3

We get rid of parentheses

a-3a-9+3

We add all the numbers together, and all the variables

-2a-6

Back to the equation:

-(-2a-6)



We add all the numbers together, and all the variables

2a-(-2a-6)+2=0

We get rid of parentheses

2a+2a+6+2=0

We add all the numbers together, and all the variables

4a+8=0

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

4a=-8

a=-8/4

a=-2

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