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100n+(-89)=121
We simplify the equation to the form, which is simple to understand
100n+(-89)=121
Remove unnecessary parentheses
+100n-89=+121
We move all terms containing n to the left and all other terms to the right.
+100n=+121+89
We simplify left and right side of the equation.
+100n=+210
We divide both sides of the equation by 100 to get n.
n=2.1
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