7+2x+x-7=6+2+1

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Solution for 7+2x+x-7=6+2+1 equation: 



7+2x+x-7=6+2+1

We move all terms to the left:

7+2x+x-7-(6+2+1)=0

We add all the numbers together, and all the variables

2x+x+7-7-9=0

We add all the numbers together, and all the variables

3x-9=0

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

3x=9

x=9/3

x=3

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