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Simplifying
81n2 + -7 = 9
Reorder the terms:
-7 + 81n2 = 9
Solving
-7 + 81n2 = 9
Solving for variable 'n'.
Move all terms containing n to the left, all other terms to the right.
Add '7' to each side of the equation.
-7 + 7 + 81n2 = 9 + 7
Combine like terms: -7 + 7 = 0
0 + 81n2 = 9 + 7
81n2 = 9 + 7
Combine like terms: 9 + 7 = 16
81n2 = 16
Divide each side by '81'.
n2 = 0.1975308642
Simplifying
n2 = 0.1975308642
Take the square root of each side:
n = {-0.444444444, 0.444444444}
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