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-7(x-3)=-7
We simplify the equation to the form, which is simple to understand
-7(x-3)=-7
Reorder the terms in parentheses
+(-7x+21)=-7
Remove unnecessary parentheses
-7x+21=-7
We move all terms containing x to the left and all other terms to the right.
-7x=-7-21
We simplify left and right side of the equation.
-7x=-28
We divide both sides of the equation by -7 to get x.
x=4
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