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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

3(a+2)-a-(2(-1a+9))=0

We add all the numbers together, and all the variables

-1a+3(a+2)-(2(-1a+9))=0

We multiply parentheses

-1a+3a-(2(-1a+9))+6=0



We calculate terms in parentheses: -(2(-1a+9)), so:

2(-1a+9)

We multiply parentheses

-2a+18

Back to the equation:

-(-2a+18)



We add all the numbers together, and all the variables

2a-(-2a+18)+6=0

We get rid of parentheses

2a+2a-18+6=0

We add all the numbers together, and all the variables

4a-12=0

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

4a=12

a=12/4

a=3

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