3x+-9=(10+x)

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Solution for 3x+-9=(10+x) equation: 



3x+-9=(10+x)

We move all terms to the left:

3x+-9-((10+x))=0

We add all the numbers together, and all the variables

3x-((x+10))-9+=0

We add all the numbers together, and all the variables

3x-((x+10))=0



We calculate terms in parentheses: -((x+10)), so:

(x+10)

We get rid of parentheses

x+10

Back to the equation:

-(x+10)



We get rid of parentheses

3x-x-10=0

We add all the numbers together, and all the variables

2x-10=0

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

2x=10

x=10/2

x=5

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