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4(40-n)-4(n)=7(n)+8
We simplify the equation to the form, which is simple to understand
4(40-n)-4(n)=7(n)+8
Reorder the terms in parentheses
+(+160-4n)-4*(n)=7*(n)+8
Remove unnecessary parentheses
+160-4n-4+*(+n+)=+7+*(+n+)+8
Reorder the terms in parentheses
+160-4n+(-4n)=7*(n)+8
Remove unnecessary parentheses
+160-4n-4n=+7+*(+n+)+8
Reorder the terms in parentheses
+160-4n-4n=+(+7n)+8
Remove unnecessary parentheses
+160-4n-4n=+7n+8
We move all terms containing n to the left and all other terms to the right.
-4n-4n-7n=+8-160
We simplify left and right side of the equation.
-15n=-152
We divide both sides of the equation by -15 to get n.
n=10.133333333333
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