x+3+2x+3=42

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



x+3+2x+3=42

We move all terms to the left:

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

We add all the numbers together, and all the variables

3x-36=0

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

3x=36

x=36/3

x=12

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