n(x)=((7x+5))/((x-9))

解

n (x) = \frac{( 7 x + 5 )}{( x - 9 )}

x = \frac{9 n + 7 + 81 n ^{2} + 146 n + 49}{2 n}, x = \frac{9 n + 7 - 81 n ^{2} + 146 n + 49}{2 n}; n \neq = 0

解答ステップ

n (x) = \frac{( 7 x + 5 )}{( x - 9 )}

簡素化

\frac{( 7 x + 5 )}{( x - 9 )} : \frac{7 x + 5}{x - 9}

n (x) = \frac{7 x + 5}{x - 9}

以下で両辺を乗じる:

x - 9

n x (x - 9) = 7 x + 5

解く

n x (x - 9) = 7 x + 5 : x = \frac{9 n + 7 + 81 n ^{2} + 146 n + 49}{2 n}, x = \frac{9 n + 7 - 81 n ^{2} + 146 n + 49}{2 n}; n \neq = 0

x = \frac{9 n + 7 + 81 n ^{2} + 146 n + 49}{2 n}, x = \frac{9 n + 7 - 81 n ^{2} + 146 n + 49}{2 n}; n \neq = 0