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-(42)=0

We add all the numbers together, and all the variables

5x-40=0

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

5x=40

x=40/5

x=8

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