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x+6x+7=13+7x
We move all terms to the left:
x+6x+7-(13+7x)=0
We add all the numbers together, and all the variables
x+6x-(7x+13)+7=0
We add all the numbers together, and all the variables
7x-(7x+13)+7=0
We get rid of parentheses
7x-7x-13+7=0
We add all the numbers together, and all the variables
-6!=0
There is no solution for this equation
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