25+x=-x+3(x+7)

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Solution for 25+x=-x+3(x+7) equation: 



25+x=-x+3(x+7)

We move all terms to the left:

25+x-(-x+3(x+7))=0



We calculate terms in parentheses: -(-x+3(x+7)), so:

-x+3(x+7)

We add all the numbers together, and all the variables

-1x+3(x+7)

We multiply parentheses

-1x+3x+21

We add all the numbers together, and all the variables

2x+21

Back to the equation:

-(2x+21)



We get rid of parentheses

x-2x-21+25=0

We add all the numbers together, and all the variables

-1x+4=0

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

-x=-4

x=-4/-1

x=+4

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