42=x+2x+3

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Solution for 42=x+2x+3 equation: 



42=x+2x+3

We move all terms to the left:

42-(x+2x+3)=0

We add all the numbers together, and all the variables

-(3x+3)+42=0

We get rid of parentheses

-3x-3+42=0

We add all the numbers together, and all the variables

-3x+39=0

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

-3x=-39

x=-39/-3

x=+13

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