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7(3n-4)=(9n+2)+9
We simplify the equation to the form, which is simple to understand
7(3n-4)=(9n+2)+9
Reorder the terms in parentheses
+(+21n-28)=(9n+2)+9
Remove unnecessary parentheses
+21n-28=+(+9n+2+)+9
Remove unnecessary parentheses
+21n-28=9n+2+9
We move all terms containing n to the left and all other terms to the right.
+21n-9n=+2+9+28
We simplify left and right side of the equation.
+12n=+39
We divide both sides of the equation by 12 to get n.
n=3.25
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