3x+9=2x-7=42

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Solution for 3x+9=2x-7=42 equation: 



3x+9=2x-7=42

We move all terms to the left:

3x+9-(2x-7)=0

We get rid of parentheses

3x-2x+7+9=0

We add all the numbers together, and all the variables

x+16=0

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

x=-16

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