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9n+8(5n-5)=-9(8n-9)
We simplify the equation to the form, which is simple to understand
9n+8(5n-5)=-9(8n-9)
Reorder the terms in parentheses
9n+(+40n-40)=-9*(8n-9)
Remove unnecessary parentheses
+9n+40n-40=-9+*(+8n-9+)
Reorder the terms in parentheses
9n+40n-40=+(-72n+81)
Remove unnecessary parentheses
+9n+40n-40=-72n+81
We move all terms containing n to the left and all other terms to the right.
+9n+40n+72n=+81+40
We simplify left and right side of the equation.
+121n=+121
We divide both sides of the equation by 121 to get n.
n=1
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