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7(x-6)+28=-21
We simplify the equation to the form, which is simple to understand
7(x-6)+28=-21
Reorder the terms in parentheses
+(+7x-42)+28=-21
Remove unnecessary parentheses
+7x-42+28=-21
We move all terms containing x to the left and all other terms to the right.
+7x=-21+42-28
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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