(5-x}{15}-9/5 =-x-\frac{1-x)/3

解答

\frac{5 - x}{15} - \frac{9}{5} = - x - \frac{1 - x}{3}

x = \frac{17}{9}

十进制

x = 1.88888 \dots

求解步骤

\frac{5 - x}{15} - \frac{9}{5} = - x - \frac{1 - x}{3}

乘以最小公倍数

- x - 22 = - 15 x - 5 (- x + 1)

乘开

- 5 (- x + 1) : 5 x - 5

- x - 22 = - 15 x + 5 x - 5

16 = 5 x - 9

s im pl i f y \frac{( 1.9 ) ^{2} - 4}{1.9 - 2}

36 x^{2} - 48 x + 96 = 0

f a c t or x^{2} - 17 x + 42

s im pl i f y (\frac{3 \cdot 8.314}{2}) (792 - 298)