x+3x+x+2x=42

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



x+3x+x+2x=42
We move all terms to the left:
x+3x+x+2x-(42)=0
We add all the numbers together, and all the variables
7x-42=0
We move all terms containing x to the left, all other terms to the right
7x=42
x=42/7
x=6

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