12x-20+5x=15+1x-(-8x)

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Solution for 12x-20+5x=15+1x-(-8x) equation: 



12x-20+5x=15+1x-(-8x)

We move all terms to the left:

12x-20+5x-(15+1x-(-8x))=0

We add all the numbers together, and all the variables

17x-(15+1x-(-8x))-20=0



We calculate terms in parentheses: -(15+1x-(-8x)), so:

15+1x-(-8x)

determiningTheFunctionDomain
1x-(-8x)+15

We add all the numbers together, and all the variables

x-(-8x)+15

We get rid of parentheses

x+8x+15

We add all the numbers together, and all the variables

9x+15

Back to the equation:

-(9x+15)



We get rid of parentheses

17x-9x-15-20=0

We add all the numbers together, and all the variables

8x-35=0

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

8x=35

x=35/8

x=4+3/8

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