7/(5(x+1/2)-0.7)=3(-x-1.2)+5

解

\frac{7}{5 ( x + \frac{1}{2} ) - 0.7} = 3 (- x - 1.2) + 5

x = \frac{1.6}{30} - i \frac{266.24}{30}, x = \frac{1.6}{30} + i \frac{266.24}{30}

解答ステップ

\frac{7}{5 ( x + \frac{1}{2} ) - 0.7} = 3 (- x - 1.2) + 5

以下で両辺を乗じる:

5 (x + \frac{1}{2}) - 0.7

7 = 3 (- x - 1.2) (5 (x + \frac{1}{2}) - 0.7) + 5 (5 (x + \frac{1}{2}) - 0.7)

解く

7 = 3 (- x - 1.2) (5 (x + \frac{1}{2}) - 0.7) + 5 (5 (x + \frac{1}{2}) - 0.7) : x = \frac{1.6}{30} - i \frac{266.24}{30}, x = \frac{1.6}{30} + i \frac{266.24}{30}

x = \frac{1.6}{30} - i \frac{266.24}{30}, x = \frac{1.6}{30} + i \frac{266.24}{30}