6+7*x+2*x=42

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Solution for 6+7*x+2*x=42 equation: 



6+7x+2x=42

We move all terms to the left:

6+7x+2x-(42)=0

We add all the numbers together, and all the variables

9x-36=0

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

9x=36

x=36/9

x=4

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