Question

Решите пожалуйста уравнение!

2x+5/7-x+2/3=1/42

2xквадрат-3x-2=0

Answer 1

$2x + \frac{30}{42} - x + \frac{28}{42} = \frac{1}{42} \\ x = \frac{57}{42} = 1 \frac{15}{42} \\ \\ 2 {x}^{2} - 3x - 2 = 0 \\ d = 9 + 4 \times 2 \times 2 = 25 \\ x1 = \frac{3 + 5}{4} = 2 \\ x2 = \frac{3 - 5}{4} = - \frac{1}{2} = 0.5$