42=4(3-x)+x

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Solution for 42=4(3-x)+x equation: 



42=4(3-x)+x

We move all terms to the left:

42-(4(3-x)+x)=0

We add all the numbers together, and all the variables

-(4(-1x+3)+x)+42=0



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

4(-1x+3)+x

We add all the numbers together, and all the variables

x+4(-1x+3)

We multiply parentheses

x-4x+12

We add all the numbers together, and all the variables

-3x+12

Back to the equation:

-(-3x+12)



We get rid of parentheses

3x-12+42=0

We add all the numbers together, and all the variables

3x+30=0

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

3x=-30

x=-30/3

x=-10

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