12+7x-9=3+5-4(2-x)

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Solution for 12+7x-9=3+5-4(2-x) equation: 



12+7x-9=3+5-4(2-x)

We move all terms to the left:

12+7x-9-(3+5-4(2-x))=0

We add all the numbers together, and all the variables

7x-(3+5-4(-1x+2))+12-9=0

We add all the numbers together, and all the variables

7x-(3+5-4(-1x+2))+3=0



We calculate terms in parentheses: -(3+5-4(-1x+2)), so:

3+5-4(-1x+2)

determiningTheFunctionDomain
-4(-1x+2)+3+5

We add all the numbers together, and all the variables

-4(-1x+2)+8

We multiply parentheses

4x-8+8

We add all the numbers together, and all the variables

4x

Back to the equation:

-(4x)



We add all the numbers together, and all the variables

3x+3=0

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

3x=-3

x=-3/3

x=-1

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