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2(n+5)-3(3n+1)=-21
We simplify the equation to the form, which is simple to understand
2(n+5)-3(3n+1)=-21
Reorder the terms in parentheses
+(+2n+10)-3*(3n+1)=-21
Remove unnecessary parentheses
+2n+10-3+*(+3n+1+)=-21
Reorder the terms in parentheses
+2n+10+(-9n-3)=-21
Remove unnecessary parentheses
+2n+10-9n-3=-21
We move all terms containing n to the left and all other terms to the right.
+2n-9n=-21-10+3
We simplify left and right side of the equation.
-7n=-28
We divide both sides of the equation by -7 to get n.
n=4
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