(X+6)+x=42

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Solution for (X+6)+x=42 equation: 



(X+6)+X=42

We move all terms to the left:

(X+6)+X-(42)=0

We add all the numbers together, and all the variables

X+(X+6)-42=0

We get rid of parentheses

X+X+6-42=0

We add all the numbers together, and all the variables

2X-36=0

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

2X=36

X=36/2

X=18

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