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-7(1-2n)+7(-3n+7)=28
We simplify the equation to the form, which is simple to understand
-7(1-2n)+7(-3n+7)=28
Reorder the terms in parentheses
+(-7+14n)+7*(-3n+7)=28
Remove unnecessary parentheses
-7+14n+7+*(-3n+7+)=+28
Reorder the terms in parentheses
-7+14n+(-21n+49)=28
Remove unnecessary parentheses
-7+14n-21n+49=+28
We move all terms containing n to the left and all other terms to the right.
+14n-21n=+28+7-49
We simplify left and right side of the equation.
-7n=-14
We divide both sides of the equation by -7 to get n.
n=2
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