xxx-7xx-x-7=0

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Solution for xxx-7xx-x-7=0 equation:


xxx-7xx-x-7=0

We simplify the equation to the form, which is simple to understand 
x-7x-x-7=0

We move all terms containing x to the left and all other terms to the right. 
+1x-7x-1x=0+7

We simplify left and right side of the equation. 
-7x=+7

We divide both sides of the equation by -7 to get x. 
x=-1

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