-21=4(x+1)+3x

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Solution for -21=4(x+1)+3x equation: 



-21=4(x+1)+3x

We move all terms to the left:

-21-(4(x+1)+3x)=0



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

4(x+1)+3x

We add all the numbers together, and all the variables

3x+4(x+1)

We multiply parentheses

3x+4x+4

We add all the numbers together, and all the variables

7x+4

Back to the equation:

-(7x+4)



We get rid of parentheses

-7x-4-21=0

We add all the numbers together, and all the variables

-7x-25=0

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

-7x=25

x=25/-7

x=-3+4/7

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