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77=7x-7(2x-4)
We simplify the equation to the form, which is simple to understand
77=7x-7(2x-4)
Reorder the terms in parentheses
77=7x+(-14x+28)
Remove unnecessary parentheses
+77=+7x-14x+28
We move all terms containing x to the left and all other terms to the right.
-7x+14x=+28-77
We simplify left and right side of the equation.
+7x=-49
We divide both sides of the equation by 7 to get x.
x=-7
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