4x+3=7(3+x)

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



4x+3=7(3+x)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

7(x+3)

We multiply parentheses

7x+21

Back to the equation:

-(7x+21)



We get rid of parentheses

4x-7x-21+3=0

We add all the numbers together, and all the variables

-3x-18=0

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

-3x=18

x=18/-3

x=-6

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