7x+3(7-x)=-(x+4)

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Solution for 7x+3(7-x)=-(x+4) equation: 



7x+3(7-x)=-(x+4)

We move all terms to the left:

7x+3(7-x)-(-(x+4))=0

We add all the numbers together, and all the variables

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

We multiply parentheses

7x-3x-(-(x+4))+21=0



We calculate terms in parentheses: -(-(x+4)), so:

-(x+4)

We get rid of parentheses

-x-4

We add all the numbers together, and all the variables

-1x-4

Back to the equation:

-(-1x-4)



We add all the numbers together, and all the variables

4x-(-1x-4)+21=0

We get rid of parentheses

4x+1x+4+21=0

We add all the numbers together, and all the variables

5x+25=0

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

5x=-25

x=-25/5

x=-5

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